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Amazon.com: KAISH 2pcs 51/64"(20mm) Diam. Aluminium Potentiometer Knobs 1/4" Universal Metal Pot Control Knobs for Guitar/Bass/AMPS Amplifier/Preamps/Efffect Pedal/Audio Equipments Black with Indicator Line : Industrial & Scientific
COMOK Silver Tone 20mm Inner Diameter Aluminium Alloy Linear Ball Roller Bearing Sliding Block: Amazon.com: Industrial & Scientific
2PCS 5mm to 6mm Aluminium Plum Flexible Shaft Coupling 25mm Length 20mm Diameter Connector Flexible Coupler for 3D Printer CNC Machine and Servo Stepped Motor: Amazon.com: Industrial & Scientific
Amazon.com: OdiySurveil(TM) 100 x 40 x 20MM Aluminium Heatsink Radiator Diffusion Cooling Fin Comb Heat Sink Cooler : Electronics
Amazon.com: Dmeizhen-Timing Pulley Wheel 40 Teeth HTD 3M Timing Pulley Bore 6/8/10/12/14/15/16/18/20mm For Width 10/15mm AF/BF Aluminium HTD3M Synchronous Belt 40T, Less runout and more Stable ( Size : 14mm , Col :
Amazon.com: TEYWET Coupling 6/8/9/10/12/14/16/18/20mm CNC Aluminium Alloy for Stepper Motor Couplings for 3D Printer Metal (Inner Diameter : Other) : Industrial & Scientific
Amazon.com: 8M 40Teeth Timing Belt Drive Pulley 20mm Bore 8mm Pitch For 30mm Width Belt 8M40T Synchronous Wheel without Step Aluminium Alloy (tooth width: 32mm, bore: 20mm) : Industrial & Scientific
Amazon.com: MXL 150T Aluminium Timing Pulley, Fit for Belt Width 9/10mm, 8/10/12/14/19/20mm Bore,Transmission Pulley (Size : Bore 12mm, Width : for Belt Width 10mm) : Industrial & Scientific
Amazon.com: uxcell Aluminium Sink Cooling Fin Heatsink 50mm x 50mm x 20mm Silver Tone : Electronics
Amazon.com: 8M 15Teeth Timing Belt Drive Pulley 20mm Bore 8mm Pitch For 15mm Width Belt 8M15T Synchronous Wheel without Step Aluminium Alloy (tooth width: 16mm, bore: 20mm) : Industrial & Scientific
Amazon.com: 50 x Black Aluminium Rivets, Dome Headed 4.8 x 20mm Blind Pop Rivet : Industrial & Scientific
Amazon.com: MXL 60T Timing Pulley, 5/6/8/10/12/15/17/20mm Inner Bore, Aluminium Pulley, Fit for Belt Width: 6/9/10mm (Size : Bore 16mm, Width : for Width 10mm) : Industrial & Scientific
Master Lock 9120EURQNOPBLK 20mm Black Covered Aluminium Padlocks Four Pack Keyed Alike - - Amazon.com
Amazon.com: SQINAA Aluminium Angle Up to 40Inch Profile Tread L Profile for Edge Protection,20mm : Industrial & Scientific
Amazon.com: SHHMA Aluminum Flat Bar Aluminium Bars Plate,Suitable for The Production of Industrial Accessories, 10 Pieces,5mm x 20mm : Industrial & Scientific