Used Schechtl Sheet Metal Folder for sale (37,247)

Condition: new, Year of construction: 2026, Heavy-duty manual universal precision sheet metal folding machine (swing bending machine) in very robust cast-iron construction – brand new Maximum bending length: 3,050 mm Maximum sheet thickness: - Steel – Precision sheet DC01-A with tensile strength approx. 350N/mm² – 2 mm - Aluminium sheet H24 with tensile strength approx. 145N/mm² – 3 mm - Zinc sheet according to DIN EN988 with tensile strength approx. 190N/mm² – 2.5 mm Upper beam – opening range 250 mm – - Allows box bending up to 250 mm. - Optionally available with motor-driven upper beam actuation. Maximum bending angle: 135° Lower beam adjustment range: 90 mm Bending beam adjustment range: 90 mm - An ideal machine for the production of pipes, pipe segments, and radius parts Itedpsy Afgzefx Amieg Dimensions without rear gauge approx. 3.6 m x 570 mm x height 1.3 m Weight: 3,000 kg

Condition: excellent (used), functionality: fully functional, You are bidding here on: a branded machine – bending brake from a very reputable and well-known manufacturer – Schechtl. Machine features: - Schechtl MA folding/bending brake - Bends cleanly – test available - Angle indicator - Bending length: slightly over 2m - Material thickness: up to 2 mm for steel sheets; for aluminium, zinc, etc., up to approx. 3 mm - Standard rail (radius rail for aluminium and zinc is available as an optional extra, as well as attachment and special rails) - Foot switch operation - Optional back gauge possible Optional: Itedpfx Asx Ruphemisg - HT 200 guillotine shear or Schröder electric guillotine shear, 2m – 2.5 mm, can also be supplied on demand Important: Optionally, you can find and purchase a wide range of machines and accessories related to sheet metal and steel processing (such as bending brakes, guillotine shears, drilling machines, roll bending machines, slitting and profiling machines – as well as accessories like beading devices, roll sets for gutter production, rear gauges, etc.), as well as hand tools and spare parts from many leading manufacturers, directly from our shop. I am always available to answer your questions. You will receive an invoice according to §25a UstG (differential taxation); VAT is included in the invoice amount. Free loading is possible – weight approx. 1650 kg. Inspection and testing can be arranged by phone and are expressly encouraged. Payment in cash upon collection. Take advantage of our experience and technical expertise – we are happy to advise you. Collection by the buyer (or by a forwarding agent commissioned by the buyer) should take place within 10 days after the end of the auction.

Condition: excellent (used), functionality: fully functional, Year of construction: 2021, machine/vehicle number: 15257, We are currently offering a 'Thalmann' double folder in excellent condition for sale. Exact designation: Iedsypxx Aspfx Amietg THALMANN - Double Folder Bending Machine – Model TD 150 – 6.4 m Series AB-SE - 6 –150 – S5 – DS 3000 / 1.50 mm (Re 275 N/mm²) DFT-System The machine is in very good technical and visual condition and fully operational. Reason for sale: The Thalmann is being sold due to investment in a new EVOBEND double folder. The machine operates flawlessly and is in daily use. Technical details (as per 12.03.2026): • Control operating hours: 5302.1 • Pump operating hours: 853.9 • Number of cutting cycles: 2,947 • Total number of sheets processed: 11,800 Machine data: TD 150 – 6.4 m S5 with DFT® technology • Working length: 6,400 mm • Insertion depth: 1,250 mm • Bending beam width: 10 mm + 10 mm additional rail • Max. bending capacity: S = 20 mm, 1.5 mm mild steel (Re 275 N/mm²) / 2.0 mm aluminium / 1.0 mm stainless steel • 180° folding performance: 50% of bending capacity • Max. bending angle: 143° (1.0 mm: 135° / 1.5 mm: 130°) • Bending accuracy: +/- 0.5° (with crowning) • Number of grippers / travel path: 4 units, +1, +1 / 15 mm – 1,250 mm • Max. gripper opening: 35 mm • Number of backgauge fingers / travel path: 4 units / 5 mm – 1,150 mm • Backgauge repeatability: +/- 0.1 mm per program cycle • Electrical connection: 400 V / 50 Hz / 3 phases + PE • Rated current / fuse / pump: 32 A / 63 A / 22 kW, 75 ccm • Dimensions: 8,050 x 2,250 x 2,100 mm • Weight: approx. 10,000 kg • Compressed air connection: 6 bar (Incl. control panel, total of 6 servo grippers, 6 backgauge fingers) Included additional equipment and features: - Free-running cutter / rotary shear: for 1.5 mm steel, 1 pc. - Bowed clamping jaw (bottom), ratio H x D = 1: 2, 1 pc. - Conical backgauge with 2-zone function: 1 pc. - Additional gripper / finger stop unit: 1 pc. - Clamping jaws made from high-strength HARDOX steel: 1 pc. - Hydraulic sheet thickness adjustment: 1 pc. - Automatic sheet loading and support table: 1 pc. - M-Guard remote maintenance support (instead of TeamViewer): 1 pc. - LED bending line illumination with RGB color selection: 1 pc. Additionally, the machine is designed to allow for technical retrofitting of the 'turning unit' (see the THALMANN AG website for further information, as per previous owner – no guarantee). All details without guarantee – errors excepted.

Condition: new, functionality: fully functional, Year of construction: 2026, Foot pedal Itsdpfx Amjy Dr Etoiog Thickness of bending beam – 15 mm Roller shear (optionally available) Bending capacity - 1.0 mm Working width - 2050 mm Weight - 400 kg Accessories - roller shear (up to 1.0 mm)

Condition: used, Year of construction: 2010, Schroder manual folding machine. The machine is very robust, fully operational, and the blades are in good condition. Testing is possible. Completely repainted in original colors. Specification: Iodpeymnhbofx Amietg Manufacturer: Schroder Model: Ak 2500/1.0 Year of manufacture: 2010 Working length: 2500 mm Bending thickness: 1.0 mm Other: Repainted. Pneumatic clamping. No back gauge. If you have further questions, we will be happy to assist you.

Condition: ready for operation (used), functionality: fully functional, Year of construction: 1987, machine/vehicle number: 6197, Auction of a Thalmann THAKO folding machine! Itjdpfx Aoyzhc Aomiog EQUIPMENT Depth stop Automatic program with stored sheet metal shapes

Condition: good (used), Year of construction: 2007, control type: manual, You are bidding here on: a branded machine - folding bench, from a very reputable and well-known manufacturer - Schechtl. Device features: - Schechtl HA folding bench - Rail bends cleanly – test possible - Degree indicator - Bending length approx. 310 cm - Sheet thickness: 1.5 mm for steel – more for aluminum, zinc, etc., up to 2 mm - Standard rail - Foot closing device - Sheet support - Optional roller shear with rail – see photos - 2024 price list (net) – prices are now significantly higher Important! Optionally, you can find and purchase a wide range of machines and machine accessories, such as various rails, depth stops – everything related to sheet metal and steel processing – including folding benches, guillotine shears, drilling machines, slip rolls, slitting and profiling machines, accessories (beading devices, roll sets for gutter production, back gauge, etc.), as well as additional hand tools and spare parts from many top manufacturers in our shop. Please don't hesitate to contact me if you have any questions. You will receive an invoice in accordance with § 25a UStG – VAT is included in the invoice amount. 2024 price list – prices have already increased noticeably. Differential taxation applies. Free loading possible – weight approx. 2,000 kg. Inspection and testing are possible and welcome by prior telephone appointment. Payment in cash upon collection. Benefit from our experience and expertise, we are happy to advise you. Itsdpfx Amjytz A Eoieg Collection by the buyer themselves (or by a shipping company commissioned by the buyer) should take place within 10 days after the end of the auction. Location: 97249 Eisingen, approx. 3 minutes from the A3 and A81 motorways. Item number: folding bench HA 310.

Condition: new, Year of construction: 2026, working width: 4,200 mm, bending angle (max.): 150 °, sheet thickness steel (max.): 8 mm, sheet thickness aluminum (max.): 1 mm, total length: 4,500 mm, Hey professionals, we know that you are always looking for the best and most powerful tool. That's why we have the ultimate solution for you: the Prod-Masz electric bending machine RED-4200/0.8/160* with recess! With our bending machine, which is equipped with an advanced electronic control system, precision and ease of use become standard. Now, a push of a button starts the bending process and guarantees flawless results without unnecessary effort. Magnets attached to the bending beam ensure a stable position of the sheet and enable precise dimensional adjustment, which is the key to perfect shapes. In addition, the machine offers a three-stage height adjustment of the upper beam and a number of necessary accessories, including a protractor, an angle limiter, a rear table for supporting the sheet -> quick adjustment with a handwheel. ✔️ Maximum working length: 4200 mm ✔️ Bending capacity: up to 0.8 mm (steel sheet) ✔️ Titanium-zinc sheet: 0.8 mm, aluminum sheet: 1.2 mm, copper sheet: 1.25 mm ✔️ Bending angle of the bending machine: max. 160 degrees ✔️ Bending beam thickness: 18 mm ✔️ Cutting with the roller shears across the entire working width ✔️ Raising the upper beam in three positions ✔️ Upper beam stroke: 80 mm Seize this unique opportunity and improve your workshop with the best folding machine on the market! Trust the manufacturer who has been the industry leader in metalworking for years. Iedpfx Ajbnq U Tjmistg -> The roller shears (max. cutting capacity 0.8 mm / steel) plus 350 euros -> a hand folding machine plus 75 euros Additional equipment: - Stop with scale - Quick adjustment via hand crank plus 1250 euros Delivery date: every week Monday/Tuesday We look forward to hearing from you! -> We issue invoices

Condition: excellent (used), functionality: fully functional, working width: 2,040 mm, bending angle (max.): 180 °, sheet thickness (max.): 2 mm, 6-way programmable control Isdpfxsynwiqo Amietg 2040 x 2 mm

Condition: used, Max. bending capacity ST 37: Iodsyinibepfx Amistg At length 500 mm: 1.0 mm At length 300 mm: 1.5 mm At length 200 mm: 2.0 mm Dimensions, approx.: 1060 x 740 x 1130 mm Weight incl. accessories, approx.: 320 kg

Condition: new, Year of construction: 2026, ZGR-3640/0.8 Warrenty: 12 months Certificate CE Eccentric pressure that is transferred to both sides of the machine Working length: 3640mm to the plate thickness of 0,8 mm STEEL SHEET 0,8 mm TITAN-ZINC-PLATE 0,8 mm, ALUMINIUM SHEET 1,2 mm , COPPER PLATE 0.8 mm, NIRO-SHEET 0,5 mm , Bending beam: 24 mm Bending angle: 145 degrees Cutting in the whole working length, Lift the upper beam in three layers, maximum width between the beams 80 mm rear frame for holding sheet, weight: 650 Kg Shears - with regulation of scissors guide and the rolls, which are made of high-alloy steel of very high resistance to wear. Isdecka N Ujpfx Amistg This allows cutting of sheet metal over a very long period without sharping the rotary shear. The performance of the rotary shear is about 40km sheet with a thickness of 0.5 mm - up to the first sharpening. The shears can be sharpened on average 35 times. The rotary shear weighs about 6.5 Kg. The price of this item does not include VAT. For invoice, we need the active VAT No. We provide VAT invoices from the tax rate of 0%. If you wish to order private, you should contact us.

Condition: new, Year of construction: 2026, PROD-MASZ 2.2 m Electric Sheet Metal Bending Machine for 2 mm Aluminum Sheets ✨ For Sale: Electric sheet metal bending machine from the renowned company PROD-MASZ. Specifications: ✅ Working Length: 2.2 m ✅ Maximum Sheet Thickness: 2.0 mm (Aluminum) ✅ Bending Angle: 15° ✅ Bending Beam: 18 mm ✅ Drive: Electric – simple and convenient operation ✅ Solid and durable construction for precise bending ✅ Machine is fully functional and ready for immediate use ✅ New, from current production ✅ 3-Phase Control 360V ✨ Ideal for sheet metal fabrication shops, roofing companies, and sheet metal processing. ✨ Professional, reliable, and industry-recognized equipment. ✨ Thanks to the electric drive, work becomes significantly easier and faster, leading to greater efficiency and time savings. ✨ Additional equipment: ✅ Roller shear 0.8mm - €350 ✅ Roller shear 1.2mm - €500 ✅ Hand folding machine €75 ✅ Magnetic setting aid up to 36cm (2 pcs) €75 ✅ Magnetic setting aid up to 65cm (2 pieces): €150 ✅ Rotary finger stop 65cm: additional €1250 ✨ Machine is available ✨ Delivery possible every Monday/Tuesday ✨ Delivery costs: € please ask Itodpfx Amjcv S A Ejisg We look forward to hearing from you! -> We issue invoices

Condition: new, Year of construction: 2026, High quality of execution and the attention to detail of all elements ensure reliable and long-term use of this modern folding machine. The application possibilities have been expanded even further by using the foot pedal. You can therefore bend at any tool position and you do not have to constantly use the clamping lever on the right end of the machine. This increases both accuracy and speed when positioning the workpiece on the bending edge. With this foot swivel bending machine you can bend the sheet from three sides. In the machine construction there is a space of 6 cm up and down for curved processing. Folding bench RED PLUS 2200 / 0.8 incl. foot control and transport wheels Technical specifications: - maximum working width: 2200 mm - Bending performance: up to 0.8 mm (sheet steel) - All non-ferrous metals 30% more bending power - Bending angle: max. 145 degrees Itjdpsc Nxwhjfx Amiog - the cut with the roller shears across the entire working width - Bending beam thickness: 15 mm - lifting the top beam in three positions - Upper cheek stroke: 80 mm Degree scale Angle stop up to 90 degrees rear frame for holding the sheet front depth stops - Weight: approx. 230 kg The roller shear (max. Cutting capacity 0.8 mm / steel) + 350 euros The machine complies with the CE guidelines and has a 12-month guarantee. Delivery time: 2-4 days We are looking forward to your contact!

Condition: new, Year of construction: 2026, Are you looking for a machine for sheet metal processing? Do you expect quality and reliability? Professional advice as well as accurate and punctual deliveries will be provided by Prod-Masz. ZGR-2140/1.5mm (2mm Alu) the maximum working length 2140 mm the thickness of the steel sheet up to 1.5 mm non-ferrous metals 30% higher bending performance bending angle: 145 degrees (on request up to 165 degrees) cut throughout the working length a table for supporting the rear plate Itsdpfx Aoc Ikrqjmiog gas springs beam curving 20 mm weight approx 350 kg hand-held machine raising the upper beam into three positions maximum ground clearance of 100 mm between the beams

Condition: new, Year of construction: 2026, Sheet metal machines type RED are the trademark of the Prod Masz company. Each RED press brake has a narrow folding beam, regardless of its length, can be bent on 3 sides thanks to side cut-outs, 2 handles on both sides. An additional advantage is more space inside for a fold. Professional folding bench RED PLUS with foot pedal Technical specifications: the maximum working length: 3200 mm Bending capacity: 0.8 mm (steel) 1.2 mm (aluminium, copper, zinc) Bending beam thickness: 15 mm Iedpfx Amecrcgqoijtg Bending angle: max 160 degrees Upper beam opening: 80 mm Weight: about 700 kg Roller scissors plus 350 euros The front depth stops and rear frame are also included in the price. Bending from 3 sides -> cutouts on the side Recess 60mm/45° Marking template FREE :) Price: EUR 6,600.00 Delivery costs: PLEASE ASK Delivery date: every week We are looking forward to your contact! Invoices are issued with 0% as intra-community delivery or with plus 23% of VAT.

Condition: new, Year of construction: 2025, All roof bending machines from PROD-MASZ are valued not only by customers from Germany, but also from all over the world. Thanks to the fact that we have been manufacturing and supplying machines that meet individual requirements for years, we have established ourselves as the market leader for bending machines in Europe and worldwide. Every roofing machine we supply has a strong and durable construction, it is manufactured to the best standards. Bending beam only 15mm RED 3200 / 0.8mm Technical specifications: the maximum working length: 3200 mm Bending capacity: 0.8 mm (steel) 1.2 mm (aluminum, copper, zinc) Itodpfxob Eg Nkj Amiog Bending beam thickness: 15 mm Bending angle: max. 150 degrees Upper cheek opening: 80 mm Weight: approx. 600 kg Roller shears + 350 Euro The front depth stops and rear frame are also included in the price. Bending from 3 sides -ᐳ cutouts laterally 60mm / 45 ° recess Price: 5100.00 EUR Delivery date: every week We are looking forward to your contact! Invoices are issued either with 0% as intra-Community delivery.

Condition: new, Year of construction: 2026, More time saved! More convenience! The RED-3200/1.0/155* electric swing bending machine is ideal for thin sheet metal processing up to 1.00 mm steel sheet, recurring one-off productions, and small-batch manufacturing. The upper beam and bending beam are motorized. The RED-3200/1.0/150* motorized swing bending machine has a working length of 3200 mm and bends steel sheets up to a maximum thickness of 1.00 mm. Prod-Masz's electric sheet metal bending machines now feature an electric pressure lifting device. This is a fully electric sheet metal bending machine. Itedpjcri E Nsfx Amiog ✔️ Maximum working length: 3200 mm ✔️ Bending capacity: up to 1.0 mm (steel sheet) ✔️ Titanium-zinc sheet: 1.0 mm, aluminum sheet: 1.2 mm, copper sheet: 1.2 mm ✔️ Bending angle of the bending machine: max. 150 degrees ✔️ Bending jaw thickness: 18 mm ✔️ Cutting with the roller shear across the entire working width ✔️ Lifting of the upper beam in three positions ✔️ Upper jaw stroke: 80 mm ✨ Seize this unique opportunity and upgrade your workshop with the best press brake on the market! Trust the manufacturer that has been an industry leader in metalworking for years. -> Rotary shear (max. cutting capacity 1.2 mm / steel) plus €500 -> crusher/ welt press plus €75 Delivery costs: € please ask Additional equipment: - Rotating finger guide 65cm plus €1250 - Measuring gauge 36cm (2 pcs.) €75 - Measuring gauge 65cm (2 pcs.) €150 Delivery date: every Monday/Tuesday Cash on delivery or prepayment We look forward to hearing from you! - We issue invoices

Condition: new, Year of construction: 2026, ZGH type machines are a versatile solution for sheet metal processing. They can be used universally for demanding craft operations. To create this versatile solution for all applications up to 1.2 mm sheet steel, PPHU Prod Masz drew on its years of experience in mechanical engineering. The ZGH offers the optimum in precision, durability and stability. This model is equipped with a control panel. the maximum working length 3140 mm the max. thickness of the sheet for 1.2 mm (steel) the weight of the hand machine is around 2100 kilograms the lifting of the upper beam in three layers bending beam: 30 mm the max. clear width between the beams 100 mm bending angle: 150 degrees delivery to Germany 750 euros delivery date: up to 2 weeks roller shears optional for an additional charge rear stops with scale optional for an additional charge Itedpfx Amsc I Tn Heieg we look forward to hearing from you!

Condition: used, functionality: fully functional, Year of construction: 2010, working width: 2,000 mm, sheet thickness steel (max.): 2 mm, sheet thickness stainless steel (max.): 1 mm, sheet thickness aluminum (max.): 4 mm, overall weight: 2,030 kg, input voltage: 400 V, input current: 4 A, input frequency: 50 Hz, We are offering this used Schechtl MAX 200/CNC S-1000/1 folding machine, year of manufacture 2010. Year of manufacture: 2010 Model: MAX 200/CNC S-1000/1 Serial number: MA5726 Take advantage of this opportunity to acquire a high-quality folding machine from Schechtl. This powerful machine is ideal for anyone engaged in sheet metal processing who demands maximum precision and efficiency. Product details: - Model: Schechtl MAX 200/CNC S-Touch - Year of manufacture: 2010 - Condition: Used Itjdpfx Ajyxpc Esmisg - Technical specifications: Bending length: 2,000 mm Steel 2.5 mm Aluminium 4.0 mm Stainless steel 1.5 mm Weight: 2,030 kg If you have any questions or require further information, please feel free to contact us by message or phone. "The machine is sold according to Incoterms® 2020 EXW [Frankenweg 2, 9100 Völkermarkt]. From the time the machine is made available at the designated location, the buyer assumes all costs and risks, including loading, transportation, and customs formalities."

Condition: new, Year of construction: 2025, The company "Prod-Masz" is an innovative medium-sized company that manufactures and sells sheet metal processing machines. A professionally designed folding machine is the basis for years of use of the machine. It is therefore important to have a trustworthy company at your side. Itjdecgbilopfx Amisg Small, compact folding edge 1250 cm to steel sheet 0.8 mm, aluminum sheet 1 mm with built-in curl forming machine and roller shears. - Possibility of cheek adjustment - Weight: 49 kg - Bending beam: 15mm - Working length: 1.25 m - built-in bead machine -ᐳ tube diameter 14mm - 60mm opening - Bending radius: 145 degrees Price: 1.450 euros We are looking forward to your contact

Condition: new, Year of construction: 2025, Delivery every Monday/Tuesday! Reliable! Ijdpfx Ajb Hqa Esmietg Mobile folding bench 1400/2.0mm without roller shears We are your partner when it comes to sheet metal working machines. Our claim to ourselves is to provide high-quality and reliable work in order to more than meet your requirements! We are only so successful because we put our heart and soul into our work! Technical specifications the maximum working length 1400 mm the max. thickness of steel sheet for 2.0mm bending beam 24 mm the weight of the handheld machine is about 190 kilograms lifting the top beam in three layers The maximum clear width between the beams is 80 mm Delivery throughout Germany 165 euros Price: 1450 euros incl. transport rollers Delivery time: every week Cash on delivery The roller scissors (max. cutting capacity up to 0.8 mm / sheet steel) optionally cost 350 euros Manual folding machine costs 75 euros as an option The machine complies with CE guidelines and has a 12-month guarantee. We issue the invoices with 0% (intra-community delivery) as well as with 23%. We are looking forward to your contact!

Condition: new, Year of construction: 2025, Sheet metal folder RED 2200/0.8 + wheels Bending machine with side cutouts for bending from up and down. Thanks to it, you will make your window sill ready. In the machine's construction there is a place for bent processing at a height of 6 cm up and down. It is a modern sheet metal folding machine that bends sheet metal from three sides. max. working length: 2200 mm bending: 0.8 mm steel sheet 1.2 mm (aluminum, copper, zinc) bending beam: 15 mm bending angle max. 150 degrees Isdpfscqu Dgex Amiotg max. opening: 80 mm weight: ca. 250 kg

Condition: new, Year of construction: 2026, The best-selling and reliable PROD-MASZ press brake! Itjdpfx Amjb Eg Hysieg Fast delivery time and high quality! Bending machine from the only, genuine and reliable manufacturer PROD MASZ® Technical specifications: - maximum working width: 2140 mm - Bending performance: up to 0.8 mm (steel sheet) - Bending angle: max 145 degrees - the cut with the roller shears over the entire working width - Bending beam thickness: 15 mm - lifting of the upper beam in three positions - Upper beam stroke: 80 mm degree scale angle stop rear rack for holding the sheet metal front depth stops - Weight: about 180 kg The roller scissors (max. cutting capacity 0.8 mm / steel) The machine complies with CE guidelines and has a 12-month guarantee. Price: € 1.050.00 Roller scissors 0.8mm - plus 350 euros Manual folding machine plus 75 euros Delivery date: every week We are looking forward to your contact! Invoices are issued with 0% as intra-community delivery or with plus 23% of VAT.

Condition: new, Year of construction: 2026, Timely delivery, trustworthy equipment ! Itsdpfx Aecgaa Hsmieg Bending machine from the only, genuine and reliable manufacturer PROD MASZ® Prod-Masz offers you first class equipment. Convince yourself of our sheet metal bending machines. Are you looking for quality and expertise for your sheet metal processing machine? Then we are the right partner at your side. Maximum working length of press brake: 2140 mm Bending performance: up to 0.8 mm (steel sheet) Titanium Zinc Sheet: 0.8mm Aluminum Sheet: 1.2mm Copper Sheet: 1.25mm Bending machine bending angle: 145 degrees max Cut with the roller shears over the entire working width Bending beam thickness: 15 mm Cut with the roller shears over the entire working width Lifting of the upper beam in three positions Upper beam stroke: 80 mm degree scale Weight of the folding bench: approx. 180 kg Roller scissors 0.8mm - plus 350 euros Manual folding machine plus 75 euros Price: 1.050 euros Delivery date: every week We are looking forward to your contact! Invoices are issued with 0% as intra-community delivery or with 23% of VAT.

Condition: new, Year of construction: 2025, METAL PLATE FOLDING MACHINE ZGR1400/2 maximum working length1400 mm sheet gauge up to 2 mm Iedpfx Ajb Aplqjmijtg approx. weight of the hand machine 180 kg shear cutting on the whole working length upper bar lifting in three positions maximum clearance between bars100 mm