PGFUN 1:20 Right Angle Worm Gearbox 90° Angle Drive Steering Gear Reducer 20T Reduction Gearbox Simple Mechanical DIY Module with 6/8mm Shaft (8mm)

PGFUN 20:1 Right Angle Worm Gearbox 90° Angle Drive Steering Gear Reducer 20T Reduction Gearbox Simple Mechanical DIY Module with 6/8mm Shaft (8mm)

uxcell 8mm to 8mm Bore Rigid Coupling Set Screw L22XD14 Stainless Steel,Shaft Coupler Connector for 3D Printers, Motor Accessories,2pcs

4Pcs 8mm Flange Coupling Connector, Rigid Guide Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors