Size:D20mm x L25mm , Bore:5mm 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 elastomer can resist oil and electrical insulation, operating temperature: -20~80 Excellent elastic effect to absorb vibration, eccentricity and deflection Item Type: 5mm x 8mm Shaft Coupler Outer Dia : 20mm Length : 25mm The coupling is closely combined with the main body of the two half coupling with polyurethane plastic as the elastic element, and the main body is mainly made of alloy aluminum. It is applicable to servo system, spindle drive, lifting platform, machine tool drive and gearbox motor. Compact, no backlash, which can absorb vibration and compensate and angular deviation. It is mainly suitable for working with frequent starting, forward and reverse rotation, medium-high speed, medium . Colour:silver Material:aluminum Package Contents: 2 x Plum coupling Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.