Zeberoxyz 2PCS 6.35mm to 10mm Aluminium Plum Flexible Shaft Coupling Diameter20mm Length25mm 6.35x10mm Motor Connector Coupler for 3D Printer CNC Machine and Servo Stepped Motor（6.35x10mm）

Size:L25mm x D20mm/0.98inch x 0.79inch( L*D) Bore Diameter: 6.35mm to 10mm / 0.25inch to 0.39inch Material: Aluminum alloy, Surface oxidation treatment; 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 coupling can be disassembled and used in combination by itself The shaft couplers are mainly used for CNC machines,servo motors, spindle, step motor etc