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: 5M 70Teeth Timing Belt Drive Pulley 20mm Bore 5mm Pitch For 20mm Width Belt 5M70T Synchronous Wheel without Step Aluminium Alloy (tooth width: 21mm, bore: 20mm) : Industrial & Scientific
Amazon.com: 8M 24Teeth Timing Belt Drive Pulley 20mm Bore 8mm Pitch For 40mm Width Belt 8M24T Synchronous Wheel without Step Aluminium Alloy (tooth width: 42mm, bore: 20mm) : Industrial & Scientific
Amazon.com: ZHIPAIJI Drone Motor Mount Seat Aluminium Alloy Accessories for DIY Quadcopter Frame Kit Parts Accessories 20mm 22mm 25mm Carbon Tube Metal (Color : Red for 20mm Tube) : Toys & Games
Vial Crimper,20A 20mm Manual Vial Crimper Aluminum&Plastic Flip Off Caps Hand Sealing Machine (20mm Aluminium-Plastic Cap) - - Amazon.com
Othmro SDA20 x 15 Sealing Thin Air Cylinder Pneumatic Air Cylinders, 20mm/0.79inch Bore 15mm/0.59inch Stroke for M5 Aluminium Alloy Pneumatic Components for Pneumatic and Hydraulic Systems 1pcs: 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
6Pack 6.6FT/2 Meter Plaster-in LED Drywall Aluminum Channel with Flange for 12mm Strip Lights, Recessed Aluminium LED Profile with Clip-in Diffuser and End Caps: Amazon.com: Tools & Home Improvement