1. Dimensions: Diameter 20 mm × Length 25 mm, Aperture: 5 mm to 8 mm 2. The elastic gasket is made of polyurethane, and its torque is more than twice that of traditional jaw couplings. 3. During the transmission process, it can achieve zero - backlash torque transmission under low - torque conditions. 4. The elastomer has oil resistance and electrical insulation properties. The operating temperature range is from - 20°C to 80°C. 5. It has excellent elastic effects and can absorb vibrations, eccentricity, and deflection. 6. Product type: 5 mm × 8 mm shaft coupling 7. Outer diameter: 20 mm 8. Length: 25 mm 9. This coupling uses polyurethane plastic as the elastic element and is tightly combined with the two half - coupling bodies. The bodies are mainly made of aluminum alloy. It is suitable for servo systems, spindle drives, lifting platforms, machine tool drives, and gearbox motors. It has a compact structure, no backlash, can absorb vibrations, and compensate for angular deviations. It is mainly suitable for working scenarios with frequent starts, forward and reverse rotations, medium - high speeds, and medium - level working conditions. 10. Color: Silver 11. Material: Aluminum 12. Package contents: Two plum couplings 13. Only the above - mentioned package contents are included, and no other products are included. 14. Note: Light reflection and different monitors may cause slight differences between the color of the items in the picture and the actual product. The allowable measurement error is ±1 - 3 cm.