Features 1、The structure is simple,easy to install,buffer,damping,convenient to disconnect 2、Compact size and smooth surface 3、The elastic connection, it can absorb vibration, compensate radial, angular and axial misalignment 4、Shaft coupling is often used to connect servo motor stepper motor,encoder, screw driving, machine platform etc 5、Widely used in the shafting transmission of various mechanical devices, such as pumps, fans, compressors, petroleum machinery, printing machinery Specification Features: The structure is simple,easy to install,buffer,damping,convenient to disconnect. Compact size and smooth surface The elastic connection, it can absorb vibration, compensate radial, angular and axial misalignment. Shaft coupling is often used to connect servo motor stepper motor,encoder, screw driving, machine platform etc. Clockwise and counterclockwise rotation properties are identical. Clamp the screws and fix them. Widely used in the shafting transmission of various mechanical devices, such as pumps, fans, compressors, petroleum machinery, printing machinery. Specifications: Elastomer material: imported polyurethane Sleeve material: high strength aluminum alloy Nominal torque: 20 (N.m) Allowable speed: 10000 (r/m) Allowable torque: 12.5 (N.M) Length: 40 mm / 1.57in Outer diameter: 30 mm / 1.18in Type: 6.35x12mm / 0.25 x 0.47in, 8x12mm /0.31 x 0.47in, 12x14mm /0.47 x 0.55in (Optional) Weight: 60g Package included: 1 x Flexible Coupler Package List