BTER Plum Shaft Coupling, 8mm X 10mm Industrial Coupling Encoder, for Encoder Connect Servo Motor Stepper Motor Screw Driving

Excefore Ball Bearing, 10 Pcs 608-2RS Industrial Bearings, Double Rubber Deep Groove Rolle Bearing, Miniature Ball Bearings for Motor, Skateboards, Inline Skates, Scooters (8 * 22 * 7 mm)