Befenybay 2PCS 8mm to 10mm Aluminium Plum Flexible Shaft Coupling Diameter 20mm Length 25mm Connector Coupler for 3D Printer CNC Machine and Servo Stepped Motor（8x10mm）

Size:L25mm x D20mm/0.98inch x 0.79inch( L*D) Bore Diameter: 8mm to 10mm / 0.31inch to 0.39inch Material: Aluminum alloy Type: Plum shaped Super torque can absorb vibration, appropriate a large torque transmission.High hardness,Durable,and excellent response,not easy to loosen Flexibility of coupling shaft removes stress between the motor and driving components The shaft couplers are mainly used for CNC machines,servo motors, spindle, step motor etc