Used Compulsory Mixer for sale (1,758)

Year of construction: 2025, condition: new, Industrial mixing machine for blending dry, moist or pasty products, specifically designed for products with large net weight. The horizontal single shaft with the double ribbon mixers is blending the materials into high uniformity in a few minutes. – Specifications: agitator type: single-shaft double ribbon agitator; capacity: max. 9000 liters; max. speed of the machine in neutral: 20 rpm; power: 90kW; machine dimensions: L6500xW2100xH2800mm; weight: 9800kg. That machine/system is available in different versions for different packaging sizes and with different packaging speeds. Bwjdpfx Ajv Nly Aec Tot Please note that our new prices are often below the usual used prices. Please feel free to inquire and tell us your packaging task. - Usually 30-50 different new machines are available immediately from stock. In addition, we have very short delivery times from approx. 3 weeks for customized machines. Deviations from the sample photo are possible. - All machines are available with full warranty.

Condition: reconditioned (used), functionality: fully functional, warranty duration: 6 months, year of last overhaul: 2026, input voltage: 400 V, DGUV certified until: 06/2027, overall weight: 1,000 kg, total width: 1,310 mm, total length: 1,175 mm, input frequency: 50 Hz, input current: 10 A, electrical fuse: 16 A, Tilting head dough mixer, movable Kemper model: F 100 ASL Stainless steel bowl Dough mixer with flour dust cover 2 bowl trolleys Stainless steel kneading arm Robust engineering DGUV V3 tested – only available from us Connection: 400V, 16A CEE plug Refurbished used machine Bjdpfx Aev D Tpzjc Tswt With warranty and spare parts service Options: Delivery service & floor mounting Maintenance contract Service package Instruction & commissioning Leasing & rental service We have a large selection of tilting head dough mixers in our showroom!

Condition: used, mileage: 322,032 km, power: 260 kW (353.50 HP), first registration: 06/2003, fuel type: diesel, overall weight: 32,000 kg, axle configuration: > 3 axles, color: grey, gearing type: semi-automatic, emission class: euro3, loading space volume: 9 m³, Equipment: ABS, air conditioning, * Sun visor * Power steering * EDC (Electronic Diesel Control) * ABS (Anti-lock Braking System) * ASR (Anti-Slip Regulation/Traction Control) * Radio * On-board computer * Cruise control * Analog tachometer * Electric windows * Electrically adjustable mirrors * Mirror heating * Rear window * Driver comfort seat * Seat heating * Longitudinal and transverse differential locks * AP axles Bwjdpfjw Rircjx Ac Tet * Steel bumper * Folding underride guard * Exhaust behind the cab * Air dryer * Reversing camera * 16-speed * Suspension: leaf spring * Payload: 17,750 * Continuous brake: engine brake ----Bodywork: Stetter AM 9 FH, 9m3, 500 liter water tank, 60 liter dosing system Sale only to business customers. FOR EXPORT, ONLY THE NET PRICE MUST BE PAID!!!!! ALL INFORMATION PROVIDED WITHOUT GUARANTEE, ESPECIALLY REGARDING EQUIPMENT & ACCESSORIES. Our General Terms and Conditions (see Legal Notice) form the basis for all contracts of sale, invoices, pro forma invoices, orders, and sales negotiations.

Condition: good (used), functionality: fully functional, Two mixers offered for sale Bsdpfx Aeylkf Hjc Tewt 1 x Rekers 1500 1 x Zyklos 1500/1000 (spare mixer, as new). For details, see type plates.

Condition: new, axle configuration: 3 axles, permissible axle load (axle 1): 10,000 kg, permissible axle load (axle 2): 10,000 kg, permissible axle load (axle 3): 10,000 kg, loading space volume: 15 m³, total length: 10,200 mm, total width: 2,500 mm, total height: 3,940 mm, suspension: air, tire size: 275/75R22,5, wheelbase: 7,020 mm, color: white, Year of construction: 2024, = Additional Options and Accessories = - Air suspension - Central lubrication = Remarks = The Wattsnew E-Box concrete mixer is an electrically driven concrete mixer. The drive unit (E-Box) is installed in place of the diesel engine and supplies power to the existing hydraulic pump as usual. Everything else remains the same, except the hydraulic pump is powered by an electric motor instead of a combustion engine. You can also easily electrify your existing concrete mixer trailer by removing the diesel engine unit and installing the E-Box. Thanks to its intelligent software, the E-Box uses little power and is extremely easy to operate. With just one button and one lever, you control the entire system. Charging is also very straightforward: after a workday, simply connect the E-Box to a charging station or a regular power outlet, and the batteries will be fully charged in five hours. The Wattsnew E-Box is completely emission-free. This means no air pollution from diesel exhaust, allowing you to work in a clean and safe environment. Local residents will also appreciate your use of an emissions-free and much quieter machine. Using electric vehicles and machinery in construction increases your chances of being awarded contracts, as customers and governments are increasingly demanding zero-emission equipment. Further information: = Further Information = General Information Year of manufacture: 2024 Applications: Construction and road building Bwedpfxsxv Ry Ro Ac Tot Material to be used: Concrete Registration number: OT-93-FF Axle configuration Tyre size: 275/75R22.5 Suspension: Air suspension Rear axle 1: Twin tyres; alloy wheels; max. axle load: 10,000 kg; steered; tyre tread left inside: 100%; tyre tread left outside: 100%; tyre tread right inside: 100%; tyre tread right outside: 100% Rear axle 2: Twin tyres; alloy wheels; max. axle load: 10,000 kg; tyre tread left inside: 100%; tyre tread left outside: 100%; tyre tread right inside: 100%; tyre tread right outside: 100% Rear axle 3: Twin tyres; alloy wheels; max. axle load: 10,000 kg; steered; tyre tread left inside: 100%; tyre tread left outside: 100%; tyre tread right inside: 100%; tyre tread right outside: 100% Weights Unladen weight: 11,440 kg Payload: 31,560 kg Gross vehicle weight: 43,000 kg Functional Body manufacturer: Stetter AM 15000 Number of chambers: 1 Water installation: Yes Water tank: 500 l Hoses: Yes Condition General condition: very good Technical condition: very good Visual condition: very good Financial Information Price: On request = Company Information = Our complete range can be found here:

Condition: used, mileage: 212,440 km, power: 294 kW (399.73 HP), first registration: 10/2014, tire size: 13R22,5, axle configuration: 8x4, wheelbase: 1,800 mm, color: white, gearing type: automatic, emission class: euro6, suspension: steel, Year of construction: 2014, Equipment: electric window regulation, General information Applicable material: Concrete Drivetrain Drive: Wheel Axle configuration Tyre size: 13R22,5 Suspension: leaf suspension Axle 2: Steering Axle 3: Double wheels Axle 4: Double wheels Weights Empty weight: 16.235 kg Carrying capacity: 15.765 kg GVW: 32.000 kg Functional Bwsdpfx Acswd Sv Es Tet Make of bodywork: LIEBHERR

Condition: good (used), Year of construction: 1974, This mixer was designed for intensive mixing and wet granulation of materials such as powder / granulate. Bwjdpfx Aowa Tcfoc Tot Working volume: 63 - 200 liters Total volume: 250 liters Cutter head: 4.9 / 6 kW, speed 1,500 / 3,000 min¹ Mixing tool: 18,5 kW, speed 2 speeds Manufacturer: Lödige Year of construction: 1974 Floor Space: 200 x 110 x 145 cm

Condition: new, mileage: 500 km, power: 315 kW (428.28 HP), fuel type: diesel, overall weight: 35,000 kg, axle configuration: > 3 axles, color: white, gearing type: automatic, loading space volume: 9 m³, Year of construction: 2026, Equipment: ABS, air conditioning, navigation system, Mercedes Benz Arocs 3243B 8x4 EURO6 GSR with Stetter AM9 FHC Ultra Eco Light Bwodpfx Acovl N Ice Tst GSR - Turn Assist, Lane Departure Warning, Emergency Brake Assist, Reversing Camera, etc. First registration: None / without registration Year of production: 2026 Km: 500 Colour: Arctic white Also available in your desired color for an additional charge (see photo) Technical Data • 315 kW • 428 HP • Front tires: 315/80R22.5 • Rear tires: 315/80R22.5 • Gross weight: 35,000 kg • Mileage: 500 km • Emission class: Euro 6e • Transmission: Mercedes Powershift 3 automatic • Condition: New vehicle Chassis Equipment • M ClassicSpace cab • Wheelbase: 4250 mm • Engine type: Euro 6e • Front axle, straight design, 7.5 t • Rear axle, hypoid, 10 t, 390 mm ring gear • Fuel tank: 320 L aluminum, plus 25 L AdBlue • Sun visor • Air conditioning • Disc brakes front and rear • Compressed air tanks in aluminum • ABS • Light sensor • Central locking system • Multimedia Cockpit, interactive 2 • Preparation for Remote Truck 3.0 App • 2 remote control keys (extra) • Navigation system • FMS fleet management interface • Reversing camera • Rear warning system • Digital tachograph, 2nd generation • Roof hatch • Driver’s comfort suspension seat, premium flat fabric • Comfort cab suspension, steel-sprung • LED daytime running lights • LED fog lights • Construction rear lights • Cruise control • Lane Keeping Assist • Attention Assist • Traffic Sign Assist • Active Brake Assist 6 • Active Sideguard Assist 2 • Frontguard Assist Superstructure Equipment • Stetter AM 9/8 FHC Ultra Eco Light line • Nominal volume: 9 m³ ready-mix concrete • PMP gearbox • 500 L water tank • Aluminum mudguards on rear axle • Folding underride guard • Transition piece • 5 m admixture pipe • Manual mixer control • Emergency stop button • Frame cover • Retaining flap for swivel chute • 42 L plastic admixture system • Work lights Non-binding offer EXW Cologne. Subject to prior sale and errors excepted. Sale to business customers only. We speak German – We speak English – Hablamos Español – Nous parlons français

Condition: good (used), Year of construction: 2015, functionality: fully functional, workpiece weight (max.): 40 kg, CABO Mixspace Multispeed Paint Mixer Gyroscopic Mixer (gyromixer) Year of manufacture: 2015 Display Alphanumeric 20 x 4 Maximum bucket weight 40 kg Bucket holder tray Pull-out Bucket gripper Automatic Gyroscopic ratio 1:1.8 Speed ​​settings 3 programmable Mixing speed 80 - 180 rpm Acceleration / deceleration during the mixing cycle Automatic speed adjustment to the bucket height Mixing cycle time 20sec - 30m Maximum bucket diameter 380 mm Bucket height: min - max 90 - 490 mm Bucket height 340 (+30) mm Bucket types Round/Square/Oval Mains voltage: 230v 50Hz 3A Machine weight 190 kg machine dimensions: width:860mm Bodpfx Acevmtw Rj Towt length:850mm height:1150mm

Condition: excellent (used), mileage: 296,962 km, first registration: 05/2015, fuel type: diesel, axle configuration: 8x4, wheelbase: 4,600 mm, fuel: diesel, fuel tank capacity: 500 l, brakes: engine braking, color: white, driver cabin: day cab, gearing type: automatic, emission class: euro6, loading space volume: 9 m³, Year of construction: 2015, Equipment: ABS, AdBlue, air conditioning, central locking, cruise control, electric window regulation, fog lights, navigation system, power mirror, soot filter, = Additional Options and Accessories = - Aluminum fuel tank - Brake booster - Low noise - Speed limiter - LED lights - Air suspension - Air horn - Particulate filter - Sun visor - Stability control - Toolbox - Power take-off (PTO) = Further Information = General Information Applicable material: Concrete Technical Data Number of cylinders: 6 Engine displacement: 12,777 cc Unladen weight: 13,500 kg Transmission Gearbox: I-SHIFT, automatic Axle Configuration Front axle 1: Steered Front axle 2: Steered Rear axle 1: Twin tires Rear axle 2: Twin tires Functional Body brand: STETTER AM 9 Condition Technical condition: very good Visual condition: very good VOLVO FM 410 8X4 WITH STETTER 9M3 MIXER + THEAM TSR 15 CONVEYOR BELT EURO 6 L PACKAGE 410 HP 8X4 DRIVE AIR SUSPENSION WHEELBASE 460 CM I-SHIFT AUTOMATIC TRANSMISSION FM CAB WITH AIR CONDITIONING, SAT NAV TOOLBOXES LED STETTER AM9 MIXER DRUM VOLUME 9M3 REMOVABLE THEAM TSR 15 CONVEYOR BELT Conveying distance from 10.1 to 15.1 m Belt width 360 mm Max. conveying capacity 70 m3 / h Rotation 310° Max. discharge height 8.5 m Weight 3,050 kg Steel structure Bwodpfx Aowhp E Soc Tet 2x outriggers Radio remote control FOLLOW US ON INSTAGRAM: GEURTSTRUCKS WE SPEAK GERMAN WE SPEAK ENGLISH HABLAMOS ESPAÑOL

Condition: excellent (used), Year of construction: 2011, functionality: fully functional, Mixer / Paddle mixer with twin shaft, CO2-cooled with vacuum and pump, equipped with a box lifter for pallet containers, capacity 4000 litres Bwsdpfswxmv Nsx Ac Tet Mixer / Paddle mixer with twin shaft, vacuum-cooled, manufactured by Seydelmann, fitted with Oslos lifter for pallet boxes, Model PV 4000 Machine number: 11423-1 Year of manufacture: 2011 Voltage: 400 V, 50 Hz, 125 A Power: 60 kW Weight: 6500 kg Dimensions: 4250 mm x 2300 mm x 2750 mm. Lifter Brand: Oslos Model: Column Loader 1000S Serial number: E0112707705119/9002 Year of manufacture: 09/2021 Voltage: 380 V, 3 Ph, 50 Hz, 5.2 A Power: 2.2 kW Lifting capacity: 1000 kg Lifter dimensions: 700 mm x 2600 mm x 4200 mm Lifting arm dimensions: 1750 mm x 1600 mm x 1250 mm

Condition: reconditioned (used), Ribbon mixer Machine has been overhauled Bedpfx Acewygclo Towt Capacity: liters Motor power: 3kW, 23 rpm Material: Steel

Condition: used, first registration: 11/2005, axle configuration: 3 axles, color: white, Equipment: ABS, Vehicle Description TRAILER WITH MIXER SUITABLE FOR SEMI-TRAILER TRACTORS * ABS * 2-pipe air connection * BPW ECO-Plus axles * 5-chamber taillights Bjdpfewlmh Esx Ac Tswt * Aluminum rims ----Body: Karrena 12/5 AS - Mixer approx. 12m³ with 500L water tank. Engine: Deutz F 6 L.914 6-cylinder, with 89 kW (approx. 120 HP), approx. 9,111 hours. Sale to businesses only. FOR EXPORT, ONLY THE NET PRICE IS PAYABLE! ALL INFORMATION IS PROVIDED WITHOUT GUARANTEE REGARDING EQUIPMENT AND ACCESSORIES. All purchase contracts, invoices, pro forma invoices, orders, and sales negotiations are subject to our General Terms and Conditions (see Legal Notice).----

Condition: used, Mixing Tank, Pressure Vessel, Used Machine Manufacturer: Robert Hinkel & Co Model: 9601 Volume: 200 L Operating Pressure: 3 bar Electrical Data: 380V; 2.0A; 0.75 kW Overall Dimensions: Ø 850 mm, height 1780 mm Design: Cylindrical tank with shallow-dished top and bottom, equipped with an agitator. The tank bottom and shell are double-walled with a heating jacket. Bwsdpfx Ajxacl Toc Tet The tank lid is removable, secured with a flanged bolted connection. The lid includes a cleaning/inspection opening. Material: Carbon steel with painted surface

Condition: used, This listing is for a Pall Allegro 200 L Single‑Use Mixer System. The unit is in full working condition and is ready for immediate release. The Pall Allegro 200 L single‑use mixer (model LGRMXTTE200L230B) is engineered for scalable, robust mixing in biopharmaceutical operations. It is part of Pall’s Allegro single‑use technology portfolio and is designed for applications from media and buffer preparation through final formulation. Built with proven engineering principles and compatibility with Pall’s Allegro biocontainer film formats, it offers ease-of-use, reproducible performance, and minimal validation burden. Key Features 4‑Pitch Blade Impeller – Effective, low-shear mixing over a broad range of conditions. Bidirectional Flow Capability – Able to run clockwise (up‑flow) or counterclockwise (down‑flow), accommodating different density fluids and solids. Bag Inflation System – Mixer bag inflation provides a controlled mixing envelope, allowing consistent performance across 50–200 L volumes, and supports gas blanketing. Flush Drain Valve – Helps avoid dead legs by removing settled materials that might otherwise be left unagitated. Retention of Allegro Film Materials – Uses the same film as standard Allegro 2D/3D biocontainers for material consistency, reducing requalification effort. Optional Baffle Kit – To mitigate air entrapment at higher rotational speeds for shear-sensitive processes. Technical Specifications Parameter Value Model / Part Number LGRMXTTE200L230B Operating Volume Range 50 – 200 L Voltage / Frequency 230 V AC, 50 Hz Current Draw ~5.1 A Motor Power 0.37 kW Rotation Speed Range 50 – 200 rpm Materials of Construction Mixer tote in 304 stainless steel; film, manifolds, ports in LDPE / PS / silicone etc. Weight (empty system) ~120 kg Footprint (W × D) 1,054 mm × 748 mm Height 1,378 mm Gas Supply Requirements 4 – 6 barg (for bag inflation / blanket) Operating Temperature Range 4 – 40 °C Connections / Ports Inlet, gas inflation, exhaust, flush drain, powder addition ports etc. Applications Upstream Media Preparation – Efficient mixing of culture media and supplements. Downstream Buffer Preparation – Rapid homogenization of buffers or reagents. Bedpfx Ajxl Dxlsc Towt Final Formulation / Filling – Gentle mixing for drug products. Powder Addition / Reconstitution – Capable of handling solid-liquid mixing (e.g. powders) with repeatability. Shear-Sensitive Biologics – Low shear impeller design suitable for sensitive proteins or biologics. Benefits & Validation High Performance Mixing across Conditions – Demonstrated capability to mix a wide range of systems including liquid-liquid, solid-liquid, and viscous solutions with good speed and uniformity. Validated Materials & Safety – Components meet USP /, USP , , endotoxin limits, gamma-irradiation compatibility (up to 50 kGy), and leak-tested containers. Reduced Validation Overhead – Using the same film materials as existing Allegro biocontainers helps streamline requalification and process transfer. Minimal Dead Volume / Entrapment – Flush drain valve and optional baffles help prevent accumulation of settled solids. Scalable & Flexible – Supports operations from 50 L to 200 L with consistent mixing performance.

Condition: used, Year of construction: 1973, Manufacturer: Grenier - Charvet Bodpfx Aox R Azroc Tswt Model: E 15 Year: 1973 ( Conformity certificate in 2001) Type : High viscosity paste mixer   Motor power : 15 CV - 11 KW Speed variation: mechanical Previous use : Paint 220 L tank Mixing tool: Ø 705 mm butterfly / cloverleaf type Vessel clamping: pneumatic   Vertical movement: hydraulic unit Height in low position: 2040 mm Height in high position: 2880 mm Stroke: 840 mm

Condition: used, Manufacturer: Grenier - Charvet Model: E 25 Type : High viscosity paste mixer   Bwedpfox R Azxsx Ac Tjt Motor power : 25 CV - 18 KW Speed variation: mechanical Previous use : Painting Agitation tool: approx. Ø 800 mm butterfly / cloverleaf type Vessel clamping: pneumatic Vertical movement: hydraulic unit

Condition: used, Year of construction: 1998, Manufacturer : VMI Rayneri Model Trimix (TXR) 10 litres Year : 1998 Type : Vacuum mixer Application : Dispersion, dissolution, homogenisation, deaeration, heat exchange > gels, creams, pomades, …   Total volume : 10 Litres Empty weight : 300 kg Power : 3.5 KW Power supply: 230 V Pressure : 2 bars Temperature : 120°C Jacket + insulation Mixing : – Anchor blade with scrapers: 0 – 60 rpm – Counter agitation: 0 – 180 rpm – Dispersion/emulsion turbine: 200 – 3000 rpm   Sold with water temperature controller : Manufacturer : SOLEV Model : RE 50-3-SC-R-20-2D Bwjdpfx Asx R Di Dsc Tjt Year : 1998 Heating capacity : 3 KW   Documentation available

Condition: used, Year of construction: 1986, Manufacturer : OLSA Model : Speedycream 750 Year : 1986 Type: vacuum mixer Bwedpfx Acsx R Dmio Tst Capacity: 750 Liters Total capacity: 880 Liters Minimum working capacity: 280 Liters Jacketed : 3 bars Inside tank pressure: 1 bar Slow stirring: 5.5 KW Planetary: 15-78 rpm Blade with Teflon scrapers: 5-26 rpm Satellite rapid mixer (located on the lid): 7.5 KW Homogenizing disperser: 1400 - 2800 rpm Movement speed: 5-26 rpm Temperature controller Planetary mixer speed indicator Internal vacuum indicator Planetary mixer power consumption indicator Fast stirrer power consumption indicator Planetary speed indicator Satellite speed selector Tilting axis Vacuum pump : 1,45 KW Drain valve Ø 65 mm Exterior dimensions: 2658 mm x 1420 mm x 2510 mm (3870 mm - lid open) Spare parts available (see photos) Original paper documentation available Video available in running condition

Condition: excellent (used), functionality: fully functional, input voltage: 400 V, DGUV certified until: 07/2027, year of last overhaul: 2022, total length: 1,800 mm, total width: 1,100 mm, total height: 1,550 mm, input current: 32 A, input frequency: 50 Hz, empty load weight: 2,000 kg, overall weight: 2,000 kg, type of input current: three-phase, electrical fuse: 32 A, Gostol SM 125 A spiral mixer TOP dough kneading machine for a maximum of 200 kg of dough Stainless steel bowl and spiral Protective cover with safety circuit 2 timers and 2 speeds Very robust technology Connection: 400V, 32A CEE plug Dimensions approx.: 1100 x 1800 x 1550/1950 mm, WxDxH Used machine Bodpfxsyaf Sdo Ac Tjwt We have other spiral mixers in stock!

Condition: reconditioned (used), functionality: fully functional, input voltage: 400 V, DGUV certified until: 06/2027, year of last overhaul: 2026, total length: 800 mm, total width: 500 mm, total height: 1,100 mm, input current: 16 A, input frequency: 50 Hz, empty load weight: 195 kg, overall weight: 195 kg, type of input current: three-phase, electrical fuse: 16 A, TOP Spiral Mixer Kemper SPL 15 Bwjdpfx Ajyaf Tboc Tet for best kneading results! 2 speeds with 2 timer controls Mobile kneading machine DGUV V 3 tested – only from us Robust technology Connection: 400V, 16A CEE plug Refurbished used machine Dimensions approx.: 500 x 800 x 1100 mm (W x D x H) With warranty & spare parts service Quality from a specialist company! Benefit from over 35 years of experience! We have many TOP spiral mixers in stock!

Condition: excellent (used), functionality: fully functional, input voltage: 400 V, DGUV certified until: 07/2027, year of last overhaul: 2024, total length: 1,200 mm, total width: 800 mm, input frequency: 50 Hz, type of input current: three-phase, electrical fuse: 16 A, Diosna SP 80 F/TU spiral mixer Compact kneading machine for customized doughs! 2 timer switches with program control Spiral mixer with 2 speeds Stainless steel bowl and spiral Robust technology Connection: 400 V Bedpfxjyakize Ac Tjwt Top used machine with warranty + spare parts service Quality from a specialist company! Benefit from over 35 years of experience! Come and visit us!

Condition: excellent (used), 458 USED Kemper Spiral mixer. TECHNICAL DATA: - Flour capacity: 125 kg, - Dough capacity: 160 kg, - 2 speeds, - Power: 5.5 - 8.5 kW, 380 V, 3 phase. EXTERNAL DIMENSIONS (in cm) - W: 140, - L: 85, Bjdpfx Aezlrnzjc Tjwt - H: 148. The device is available to verify in our warehouse (36-068 Bachórz, Poland). Paid options available: transport of the device. The price is a net price. Our languages: ENGLISH, FRENCH, GERMAN, RUSSIAN, UKRAINIAN.

Condition: good (used), Year of construction: 1990, Kemper SPA 150 spiral mixer - used - year of manufacture approx. 1990 - capacity 240 kg of dough Bedpfx Acjzp D Rvj Towt - 3 removable bowls - machine from production - cleaned and inspected - collection from warehouse / shipping option available - price upon request

Condition: reconditioned (used), Oase SPK 50 spiral mixer - used - capacity: 80 kg of dough (50 kg of flour) - 2 speeds - 2 timers - bowl and mixing arm made of stainless steel Bodoznwg Iopfx Ac Tjwt - the unit has been refurbished - very good technical condition - pick-up from the warehouse / optional delivery to the buyer - price upon request