Used Tennant M17 for sale (58)

Condition: like new (used), Year of construction: 2022, operating hours: 13,394 h, functionality: fully functional, Battery-powered high-performance sweeping/scrubbing machine Scrub and sweep in one pass: with the M17 battery-powered ride-on scrubber-dryer from Tennant® Without chemicals, but with ec-H2O™ technology and ionized water: This is how you clean floors economically and environmentally consciously with the Tennant® M17 ride-on scrubber-dryer. In addition to the environmentally friendly cleaning technology, you benefit from the ease of use of the cleaning machine - whether in use or during maintenance. Conveniently inspect suction feet, brushes and filters via tool-free access points. The double side sweeping brushes also enlarge the cleaning path and ensure highly productive sweeping and scrubbing. The Touch-n-Go™ control panel integrated in the steering wheel enables intuitive 1-hand operation. This allows the driver to keep both hands on the steering wheel and steer the industrial scrubber-drier safely. The chemical-free ec-H2O™ technology effectively removes dirt and leaves floors without chemical residue. This improves traction and prevents slipping accidents when cleaning with the Tennant® M17 ride-on scrubber-dryer. With 2,500 psi high-pressure cleaner for removing coarse dirt Area of application: Industry Voltage: 36 V Battery voltage: 36 V/per unit Charger: external Direction of travel: Reverse, forward Dirty water tank capacity: 346 l Working width: 1220 mm Brush speed: 500 rpm Brush motor power: 1125 W Automatic brush switch-off: yes Number of wheels: 3 Wheel width: 127 mm Operator cockpit: yes Suction foot width: 1245 mm Body color: green Width: 1370 mm Drive: Battery Brush material: Polypropylene (PP) Rim material: Iron Sweeping width side brushes: 785 mm Sweeping width without side brushes: 915 mm Sweeping capacity with 2 side brushes theoretical: 17560 m²/h Sweeper type: Ride-on sweeper Number of sweeping blades: 1 Power transmission: V-belt Steering wheel material: PU foam Length: 2850 mm Castors Material: Polypropylene (PP), nylon, polyester Dirt container volume: 45 l Side brushes foldable: yes UVP: 120.307 € Technical features Sweeping rollers + side brushes Height-adjustable: depending on brush pressure Practical area coverage: 10,310 sqm incl. Ech2o Climbing ability: transport (empty) 20%, transport gross weight 13%, working mode 11% Consumption: Runtime 2.9 hours Operation: Battery Battery type: Lead-acid battery Battery capacity: 775 Ah/per unit Driving speed: 5 - 9 km/h Djdsv Hqh Hspfx Abvjwb Noise level in dB(A): 75 dB(A) Fresh water tank capacity: 285 l Theoretical area coverage: 17560 m²/h Brush diameter: 230 mm Brush contact pressure: 250 kg Tire material: Polyurethane (PU) Non-marking wheels: yes Wheel diameter: 381 mm Suction lip material: Linatex Suction motor power: 1200 W Frame color: grey Height: 1480 mm Own weight: 2165 kg Number of batteries: 1 Weight without battery: 1515 kg Filter area: 51000 cm² Sweeping width with 2 side brushes: 1700 mm Sweeping capacity with 2 side brushes practical: 10310 m²/h Sweeper filter cleaning: electric Sweeping principle: Direct sweeping system Body material: ABS plastic Running time: 6.5 h Number of swivel castors: 1 Reverse gear: yes Number of side brushes: 2 Seat material: Plastic Turning radius: 3003 mm Year of construction: 2022 Financing through our bank is also possible. komplett-konzept.leasingo.de

Condition: used, sweeping width 800 tenb. container volume 114 l total power requirement 3,0 kW 2759 m²/h max. 5232 m²/h Dwsdpfx Aeg Ti Ihebveb Sweeper - scrubber dryer Operating hours: approx. 400 hours incl. 4x brush + charger including new battery pack (consisting of 6x gel battery) !!

Condition: used, operating hours: 3,096 h, functionality: fully functional, fuel type: electric, drive type: Elektro, Sweepers Condition (Technical): Good Battery Voltage: 36V Battery Ah: 240Ah Battery Manufacturer: SBS Battery Type: PzS Dwsdpfxozzr Ite Abvjb Battery Year of Manufacture: 2023 Battery Condition: 60 - 80% Description: German Tennant 6200 No.: 6200-U02135 Year of manufacture: 2016 Operating hours: approx. 696 Drive: Electric Voltage: 36 V Power: 1.8 kW Battery: 36 V / 240 Ah, year 2023 Battery manufacturer: SBS Battery weight: 317 kg Maximum machine weight: 927 kg Type: Ride-on sweeper Equipment: Side brushes, main sweeping brush, lighting and warning beacon. Known defect: Vacuum fan motor defective. Fast and uncomplicated transport can be arranged upon request! This advertisement is intended solely for the identification of the machine. A detailed description of its condition and possible equipment is available individually upon request. Errors and prior sale reserved. Sale exclusively to commercial customers. All used equipment is sold without warranty or guarantee. Should you not have found the right machine, please contact us. We have a large selection of additional equipment available on site. English Tennant 6200 No.: 6200-U02135 Year of manufacture: 2016 Operating hours: approx. 696 Drive: Electric Voltage: 36 V Power: 1.8 kW Battery: 36 V / 240 Ah, year 2023 Battery manufacturer: SBS Battery weight: 317 kg Maximum machine weight: 927 kg Type: Ride-on sweeper Equipment: Side brushes, main sweeping brush, lighting and warning beacon. Known defect: Vacuum fan motor defective. Fast and uncomplicated transport can be arranged upon request! This advertisement is intended solely for the identification of the machine. A detailed description of its condition and possible equipment is available individually upon request. Errors and prior sale reserved. Sale exclusively to commercial customers. All used equipment is sold without warranty or guarantee. Should you not have found the right machine, please contact us. We have a large selection of additional equipment available on site.

Condition: used, Year of construction: 2014, operating hours: 3,497 h, functionality: fully functional, machine/vehicle number: U01521, fuel type: electric, drive type: Elektro, Scrubber-Dryer VIN: U01521 Condition: Ready for use and fully functional Technical Condition: Very good Battery Voltage: 36V Battery Type: PzS Battery Year of Manufacture: 2017 Dwodpfxowb Iu Ee Abvsb Description: Tennant 8300 GS No.: R0558 Year of Manufacture: 2014 Operating Hours: 3497 The machine is in very good visual and technical condition. Fast and uncomplicated transport is possible upon request! This listing is for identification purposes only! A detailed description of the condition and possible equipment is provided upon request! Errors and prior sale excepted, sale to businesses only. All sales of used goods are made without warranty or guarantee. If you haven't found the forklift you're looking for, please contact us. We have a large selection of other machines on site.

Condition: used, Year of construction: 2015, operating hours: 3,182 h, functionality: fully functional, machine/vehicle number: U01537, fuel type: electric, empty load weight: 2,900 kg, drive type: Elektro, Sweeper Chassis number: U01537 Condition: Ready for use and fully functional Technical condition: good Battery voltage: 36V Battery capacity: 930Ah Djdpfx Ajzyda Ejbvowb Battery manufacturer: SBS Battery type: PzS Battery year of manufacture: 2021 Battery condition: 60 - 80% Description: German: Tennant 8300, No.: R0820, Year of manufacture: 2015, Operating hours: 3,182 h, Drive type: Electric, Battery: 36 V / 930 Ah, year 2021, manufacturer SBS, Battery type: PzS, Battery condition: 60–80%, Equipment: ec-H2O system, side brush, high-dump hopper, work lights and warning beacon. Charger available upon request. Fast and uncomplicated transport can be arranged upon request! This advertisement is intended solely for the identification of the machine. A detailed description of its condition and possible equipment is available individually upon request. Errors and prior sale reserved. Sale exclusively to commercial customers. All used equipment is sold without warranty or guarantee. Should you not have found the right machine, please contact us. We have a large selection of additional equipment available on site. English: Tennant 8300, No.: R0820, Year of manufacture: 2015, Operating hours: 3,182 h, Drive type: Electric, Battery: 36 V / 930 Ah, year 2021, manufactured by SBS, Battery type: PzS, Battery condition: 60–80%, Equipment: ec-H2O system, side brush, high-dump hopper, work lights and warning beacon. Charger available upon request. Fast and uncomplicated transport can be arranged upon request! This advertisement is intended solely for the identification of the machine. A detailed description of its condition and possible equipment is available individually upon request. Errors and prior sale reserved. Sale exclusively to commercial customers. All used equipment is sold without warranty or guarantee. Should you not have found the right machine, please contact us. We have a large selection of additional equipment available on site.

Condition: used, functionality: fully functional, machine/vehicle number: U00188, Year of construction: 2015, operating hours: 1,334 h, construction height: 2,170 mm, empty load weight: 2,750 kg, total length: 2,370 mm, construction width: 1,450 mm, sweeping width: 1,450 mm, Wet scrubber machines Chassis number: U00188 Condition: Ready for use and fully functional Technical condition: Very good Front tire type: Solid rubber Rear tire type: Solid rubber Battery voltage: 36V Battery Ah: 930Ah Battery type: PzS Battery year of manufacture: 2015 Battery condition: 60 - 80% Description: German Tennant T17 No.: R0800 Year of manufacture: 2015 Operating hours: 1,334 Chassis number: U00188 Working width: 1,450 mm Overall height: 2,170 mm Length: 2,370 mm Overall width: 1,450 mm Weight: 2,750 kg Battery: 36 V / 930 Ah, PzS, year 2015 Battery condition: 60–80 % Tires: Solid rubber, single tires front and rear Condition: Ready for use and fully functional Visual condition: Very good Technical condition: Very good Location: Düsseldorf Availability: Immediate Charger: Not included Fast and uncomplicated transport can be arranged upon request! This advertisement is intended solely for the identification of the machine. A detailed description of its condition and possible equipment is available individually upon request. Errors and prior sale reserved. Sale exclusively to commercial customers. All used equipment is sold without warranty or guarantee. If you have not found the right machine, please contact us. We have a large selection of additional equipment available on site. English Tennant T17 No.: R0800 Year of manufacture: 2015 Operating hours: 1,334 Serial number: U00188 Working width: 1,450 mm Overall height: 2,170 mm Length: 2,370 mm Overall width: 1,450 mm Weight: 2,750 kg Battery: 36 V / 930 Ah, PzS, year 2015 Battery condition: 60–80% Tires: Solid rubber, single tires at the front and rear Condition: Ready for use and fully functional Visual condition: Very good Technical condition: Very good Location: Düsseldorf Availability: Immediately Charger: Not included Fast and uncomplicated transport can be arranged upon request! This advertisement is intended solely for the identification of the machine. A detailed description of its condition and possible equipment is available individually upon request. Errors and prior sale reserved. Sale exclusively to commercial customers. All used equipment is sold without warranty or guarantee. Should you not have found the right machine, please contact us. We have a large selection of additional equipment available on site. Dsdpfxjzqhh Ij Abvswb

Condition: excellent (used), functionality: fully functional, Tennant Type: T7+ ec-H2O™ Compact design with high maneuverability Item description: Clean hard floors comfortably, efficiently, and economically: with the battery-powered Tennant ride-on scrubber-dryer T7+. Thanks to its compact design, the ride-on machine is suitable for tight spaces and narrow aisles. The optional ec-H2O-NanoClean technology ensures reduced water and cleaning agent consumption. Compact design – ideal for aisles and elevators. Clear lines of sight and easy-to-use controls. Optimal water extraction – no cleaning agent residue. Optional ec-H2O-Clean technology for reduced cleaning agent consumption. Easy-to-clean, hygienic tanks. Low noise level of 67 dB(A). Automatic brake and parking brake. Available with various working widths. Includes battery, on-board charger, and brush. Technical details: Area of application: Indoor Operation: Battery Voltage: 24 V Battery type: Gel battery Battery capacity: 240 Ah/per unit Frequency: 50 - 60 Hz Travel speed: 6.4 km/h Direction of travel: Forward, Reverse Noise level in dB(A): 67 dB(A) Fresh/dirty water tank removable: No Tank volume fresh water: 110 l Tank volume dirty water: 110 l Theoretical area performance: 5120 m²/h Practical area performance: 5120 m²/h Working width: 800 mm Brush diameter: 400 mm Dwedpfx Aboziiu Hjveb Brush speed: 260 rpm Brush pressure: 36 - 73 kg Brush motor power: 450 W Brush-assisted drive: No Brush shut-off: Automatic, Yes Tire material: Rubber Number of wheels: 3 Wheels leave no marks: Yes Wheel width: 80 mm Wheel diameter: 250 mm Turning radius: 1840 mm Operator cockpit: Yes Squeegee blade material: Linatex Squeegee width: 1000 mm Vacuum motor power: 450 W Body color: Teal Frame color: Teal Height: 1270 mm Width: 740 mm Depth: 1270 mm Weight: 443 kg Version with ec-H2O™ Rim material: Polyamide Condition: used Scope of delivery: (See picture) (Changes and errors in the technical data are subject to change!) We will gladly answer any further questions you may have by phone.

Condition: good (used), Permanent Magnet Motor, Permanent Magnet Motor, Electric Motor, n-Mot, Perm Magnet Motors, Servo Motor -Manufacturer: Tennant, Permanent Magnet Motor Type 377425 -Power: 0.74 kW -Speed: 2200 rpm -Voltage: 36 V Dodjfv Ap Nepfx Abvswb -Gearbox: Regal-Beloit 7722703-SJ -Translation: 7.5 : 1 -Shaft: Ø 19 x 35 mm -Dimensions: 395/210/H195 mm -Weight: 21 kg

Condition: excellent (used), Quick Snap brush segment, brush, plastic brush, nylon brush Dwjdsgtu Ubepfx Abvob -Manufacturer: Tennant, brush, 20" nylon with plate, unused, original packaging -Type: 14967 Disco 20" D=500 -Number: 2x brushes available -Price: per piece -Dimensions: Ø 500 x 110 mm -Weight: 6 kg/piece

Condition: good (used), electric motor, three-phase motor Dodpfx Ajdv H E Tsbvswb -Voltage: 36 V -Power: 0.37 kW -Speed: 320 rpm -Shaft diameter: 19 x 40 mm -Dimensions: Ø 166/H192 mm -Quantity: 2 available -Price: per piece -Weight: 14 kg

Condition: used, Scrubbing machine, floor cleaning machine, mopping machine -Working width: 430 mm -Dimensions: 530/760/H860 mm -Weight: 50 kg Dodjdtcriopfx Abvewb

Condition: used, Electric motor, three-phase motor -Voltage: 36V -Speed: 320 rpm Dodpfsdwa Dfex Abvewb -Shaft diameter: 19 x 40 mm -Dimensions: Ø 167/H199 mm -Weight: 16 kg

Condition: good (used), Year of construction: 2004, fuel type: electric, fuel: electricity, loading space width: 700 mm, loading space length: 700 mm, loading space height: 1,100 mm, Field of application: Grounds care Empty weight: 40 kg Working width: 50 cm Technical condition: good Visual appearance: good Production country: US Please contact Vink Machinery for more information Tennant 2370 Floor Scrub Machine * 2004 * 230-volt drive Dwsdpew Nx Spsfx Abvsb * 40 kg net weight

Condition: used, operating hours: 500 h, functionality: limited functionality, fuel type: electric, drive type: Elektro, Sweepers Condition: Not operational Technical condition: poor Battery voltage: 24V Dodpfxjy Si T Rs Abvewb

Condition: used, Year of construction: 2017, operating hours: 89 h, functionality: fully functional, machine/vehicle number: U02424, fuel type: electric, construction height: 1,100 mm, drive type: Elektro, sweeping width: 900 mm, Vacuum sweeper VIN: U02424 Dedswlwfhjpfx Abvswb Technical condition: very good Battery voltage: 36V Battery Ah: 210Ah Battery type: Gel Battery year of manufacture: 2025 Battery condition: New Description: Tennant 6100 No.: R0570 Year of manufacture: 2017 Operating hours: 89 Easy to use 970 mm working width 560 mm main brush length 970 mm working width Maintenance-free battery 36 V / 210 Ah External charger 90 kg debris hopper Easy to empty Battery runtime up to 3.4 hours Weight including battery: 503 kg Up to 3,270 m² area performance per hour Multi-stage filter system The machine is in very good visual and technical condition. Fast and uncomplicated transport is possible upon request! The advertisement is for identification purposes only. A detailed description of the condition and possible equipment is available upon request! Errors and prior sale excepted. Sale to commercial customers only. All sales of used goods are made without warranty or guarantee. If you haven't found the forklift you're looking for, please contact us. We have a large selection of other equipment on site.

Condition: reconditioned (used), Year of construction: 2019, functionality: fully functional, working width: 410 mm, overall weight: 37 kg, warranty duration: 12 months, TENNANT F12 SINGLE DISC SCRUBBER Dwodpezvaqxofx Abvsb Two operating modes: 170 RPM and 340 RPM. Manufactured in 2019. The 410mm cleaning head is equipped with a new, medium-hard disc brush, allowing for work on any surface. The advantages of single-disc machines powered by 230V include a simple design, low operating costs, and reliability. High maneuverability thanks to their compact size. The powerful centrally located motor ensures uniform pressure and significantly simplifies operation. It is perfect for small spaces where easy maneuverability is essential. This makes the machine suitable for use in places such as car showrooms, boutiques, museums, hotels, restaurants, offices, public buildings, and many others. You are purchasing the exact machine you see in the photos. Other models are available in our other auctions, which we encourage you to check out. TECHNICAL DATA: Power supply (V): 230 Working width (mm): 410 Rotation speed (min): 170/340 Power consumption (W): 1200/1500 Weight (kg): 36.5 INCLUDED: NEW 410mm PPL 0.5 disc brush 5 liters of TENZI NORMAL fluid - FREE KEY FEATURES: Thanks to its design, the machine is highly maneuverable. The small turning radius allows operation even in narrow passages and alleys. The large working width (410mm) ensures high surface coverage. A clearly legible and intuitive control panel.

Condition: used, Manufacturer: Tennant Company (USA) Model: M20 Type: Industrial Scrubber-Sweeper (combination machine) Power source: Diesel, LPG, or Battery (depending on version) Cleaning Width: - Main brushes: ~1020 mm (40 inches) - With side brushes: up to 1400 mm (55 inches) Solution Tank Capacity: 303 liters Recovery Tank Capacity: 360 liters Working Speed: ~8 km/h Approximate Weight (unloaded): ~2,177 kg Approximate Dimensions: Dwedswf E Dropfx Abvsb - Length: ~2460 mm - Width: ~1220 mm - Height: ~1430 mm

Condition: used, Tennant 5680 Walk-Behind Floor Scrubber – Key Specifications a Tennant 5680 battery-powered walk-behind floor scrubber, ideal for commercial and industrial cleaning applications. This model is known for its durability, reliability and excellent cleaning performance — perfect for warehouses, manufacturing floors, supermarkets, healthcare facilities and contract cleaning operations. - Model: Tennant 5680 (battery-powered walk-behind scrubber) - Solution tank: 30 gallons / 114 L - Recovery tank: 40 gallons / 151 L - Brush motors: (2) 0.75 hp (0.5 kW) - Brush speeds: - • Disc: 200 rpm - • Cylindrical: 750 rpm - Vacuum motor: 0.8 hp, 3-stage - Battery system: 36 V (Standard ≈ 240 Ah) - Machine weight (with batteries): ~805 lb / 365 kg - Noise level: ~75 dBA - Estimated cleaning coverage: up to ~30,600 ft²/h (≈ 2,845 m²/h) depending on path & technology used Condition Dedex Szwbjpfx Abvjwb - Machine is in excellent working condition - Fully tested and ready for immediate use - Batteries and scrub heads in operational condition (specify if new/serviced if applicable) Contact us for pricing, additional pictures, video demonstration, or to schedule a viewing. Worldwide delivery available. keywords: Tennant 5680 floor scrubber, walk-behind scrubber, battery floor scrubber, industrial floor cleaning machine, used Tennant 5680 for sale

Condition: used, Year of construction: 2000, operating hours: 1,145 h, functionality: fully functional, working width: 1,145 mm, overall weight: 2,065 kg, tank capacity: 265 l, water tank capacity: 265 l, Brand: Tennant Model: 7400 Year of manufacture: 2000 Operating hours: 1145 Drive: Gas / internal combustion engine Type: Ride-on sweeper-scrubber Weight: approx. 2065 kg Functions: - Sweeping coarse and fine debris - Scrubbing with water and detergent Dsdpfxex Ib I Sj Abvewb - Direct suction of dirty water - Suitable for warehouses, production halls, workshops, and parking garages. Condition: Used machine with normal signs of wear consistent with its age. Fully equipped. Wear parts such as squeegees and brushes may need to be replaced or adjusted over time, depending on intended use. Note: Sale in current condition. Viewing by appointment possible.

Condition: used, machine/vehicle number: 053560166, sweeping width:72 cm Capacity:1450 Watt total power requirement:1,27 kW weight of the machine ca.:0,225 t dimensions of the machine ca.:0,55 x 1,25 x 1,15 m Dwedpfxocxxt So Abveb

Condition: used, Year of construction: 1995, machine/vehicle number: 425006027, sweeping width:82 cm total power requirement:0,96 kW weight of the machine ca.:0,33 t dimensions of the machine ca.:0,82 x 1,40 x 1,0 m Dwedpfxjcxxtco Abvsb

Condition: used, machine/vehicle number: 465550442, sweeping width:66 cm total power requirement:1,49 kW weight of the machine ca.:600 kg Dwsdpfjcxxv Dox Abveb dimensions of the machine ca.:0,72 x 1,55 x 1,15 m

Condition: new, functionality: fully functional, power: 15.5 kW (21.07 HP), fuel type: gasoline, color: yellow, operation weight: 205 kg, Year of construction: 2026, Kaeser Mobilair M17 Construction Compressor incl. DLA (A) NEW Kaeser Mobilair M17 Construction Compressor incl. DLA (A) – NEW | 1.0 m³/min Free Air Delivery | 15 bar Operating Pressure | Honda GX 630 Petrol Engine Technical Data: Manufacturer: Kaeser Model: Mobilair M17 Condition: NEW Operating Pressure: max. 15 bar Free Air Delivery: 1.0 m³/min Engine: Honda GX 630 petrol engine Engine output: 15.5 kW Tank capacity: 20 liters petrol Compressed air connection: 1 x G 1/2 Operating weight: 205 kg Transport frame: with carry handles Equipment: Compressed air aftercooler DLA (A) & condensate separator incl. connection hoses Starting system: Electric start Highlights & Features: - Compact high-pressure compressor for versatile construction site applications - Honda petrol engine – powerful & reliable - 15 bar operating pressure – ideal for specialized applications - Aftercooler & condensate separator – for dry compressed air - Transport frame with carry handles – easy handling - G 1/2 connection – compatible with standard compressed air systems - Made by Kaeser – proven quality & immediately available Dwodpfx Abezrtmfoveb Areas of Application: ✓ Operation of high-pressure pneumatic tools ✓ Road and civil engineering ✓ Fiber optic expansion ✓ Municipal operations & maintenance ✓ Construction companies, landscaping & utility services ✓ Infrastructure & renovation projects Location: Depot at D-46514 Schermbeck (NRW) – Inspection & collection possible Delivery: Germany-wide & international on request Pricing: Ex stock Maassenstraße 91, D-46514 Schermbeck (Wesel district) All information without guarantee. Subject to prior sale and errors. Prices plus VAT / VAT excluded More compressors & sizes available! ➡️ Mobile & stationary compressors, pneumatic tools, hoses & accessories Kaeser compressor for sale | Mobilair M 17 NEW | High-pressure compressor 15 bar | Compressor with Honda GX 630 | 1 m³/min free air delivery | Compressed air for construction sites | Kaeser compressed air technology | Compressor with aftercooler & condensate separator Your reliable partner for compressed air & construction equipment: Claudio Macagnino Construction Machinery & Commercial Vehicle Trading GmbH ➡️ Contact us now & secure immediately available new equipment! If required, we are happy to offer a virtual inspection of the machine via video call.

Condition: used, Fiber optic cable, fiber optic line, data cable, LAN cable, fiber optic cable, coaxial cable, antenna cable -Manufacturer: Bedea, coaxial cable 93 Ohm Dwodpfxskwg Hns Abvsb -Type: M17/90-RG 71 -Length: 200m -Price/delivery: complete -Dimensions roll: Ø 400 x 240 mm -Weight: 14.1 kg

Condition: good (used), Dividing head, spiral milling device, dividing head, tool holder for grinding, drill grinding machine, milling cutter grinding machine, drill grinding holder, V-belt drive -Manufacturer: Stankoimport, V-belt drive for tool grinding machine -Type: 36642.M17 -Belt width: 10 mm -Dimensions/recording: see photos -Dimensions: 188/135/H160 mm -Weight: 5.6 kg Dedpfexfh A Iox Abvowb