Size:D25mm*L30mm , Bore:8mm to 8mm The elastic spacer is made of polyurethane, and the torque exceeds the traditional claw coupling by more than 2 times During transmission, it can realize zero backlash torque transmission torque under low torque state Plum blossom elastomer can resist oil and electrical insulation, operating temperature: -20℃~80℃ Excellent elastic effect to absorb vibration, eccentricity and deflection Upgrade D25*L30 Flexible Shaft Coupling 8mm to 8mm Aluminium Plum Connector Flexible Coupler for 3D Printer CNC Machine and Servo Stepper Motor