YOTINO 5Pcs Flexible Couplings 5mm to 8mm NEMA 17 Shaft Coupler Aluminum Alloy Joint Connector for Creality CR-10 CR-10S S4 S5 Makerbot RepRap Prusa i3 3D Printer or CNC Machine

YOTINO flexible shaft couplings, adoption of premium aluminum material, it is durable and long lasting use.Compatible with stepper motors, 3D Printers or small CNC machines. Features: Color: Silver. Material: Aluminum alloy. Size: About 5mm x 8mm x 25mm/ 0.2 x 0.31 x 0.98 inch (LxWxH). Made of premium aluminum material, it is durable and long lasting use. Shaft coupler often used to connect servo motor, stepper motor, encoder, screw driving, machine platform, etc. The motor shaft coupler provides an extremely tight grip without marring the shaft. Compatible with stepper motors (for 5mm shaft diameter). Fits for RepRap 3D Printers or small CNC machines. Shaft: 5mm to 8mm / 0.2inch to 0.31inch. Package Including: 5 x Flexible Shaft Couplings 5mm to 8mm Stepper Motor Coupler Aluminum Alloy Joint Connector for RepRap 3D Printer CNC Machine