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: 20mm 4 Flute HSS and Aluminium End Mill Cutter CNC Bit : Industrial & Scientific
Amazon.com : LTEFTLFL Ssk C20-20-130 20Mm Indexable Chamfer End Mill with 10Pcs Apkt1604 Aluminium Inserts : Tools & Home Improvement
Ks-Tek 20mm Aluminium Cap for Crimp Glass Vial Aluminium Sealing Top (Green) 100pk: Amazon.com: Industrial & Scientific
2PCS 5mm to 8mm Aluminium Plum Flexible Shaft Coupling D20 L25 Connector Flexible Coupler for 3D Printer/DIY Encoder and Servo Stepped Motor: Amazon.com: Industrial & Scientific
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 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: SHHMA Aluminum Flat Bar Aluminium Bars Plate,Suitable for The Production of Industrial Accessories, 10 Pieces,5mm x 20mm : Industrial & Scientific
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 :