Features:The structure is simple,easy to install,buffer,damping,convenient to disconnect.Compactsizeand smooth surfaceThe 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 polyurethaneSleeve material: high strength aluminum alloyNominal torque: 20 (N.m)Allowable speed: 10000 (r/m)Allowable torque: 12.5 (N.M)Length: 40 mm / 1.57inOuter diameter: 30 mm / 1.18inType: 6.35x12mm / 0.25 x 0.47in, 8x12mm /0.31 x 0.47in, 12x14mm /0.47 x 0.55in (Optional)Weight: 60gPackage included:1 x Flexible Coupler