A. Dimensions: Diameter 20 mm × Length 25 mm, Aperture: 5 mm to 8 mm B. The elastic gasket is made of polyurethane, and its torque is more than twice that of traditional jaw couplings. C. During the transmission process, it can achieve zero - backlash torque transmission under low - torque conditions. D. The elastomer has oil resistance and electrical insulation properties. The operating temperature range is from - 20°C to 80°C. E. It has good elastic effects and can absorb vibrations, eccentricity, and deflection. F. Product type: 5 mm × 8 mm shaft coupling G. Outer diameter: 20 mm H. Length: 25 mm I. 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 suitable for working scenarios with frequent starts, forward and reverse rotations, medium - high speeds, and medium - level working conditions. J. Color: Silver K. Material: Aluminum L. Package contents: Two plum couplings M. Only the above - mentioned package contents are included, and no other products are included. N. 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.