Keyless Bushing Flange Type Not Applicable For Bore Diameter 24 mm Keyless Bushing Type Multi-Screw Locking Assembly Material Steel Outside Diameter 55 mm Overall Width 46 mm System of Measurement Metric Finish Oil Dipped Hub Contact Pressure 67 007.988 psi Maximum Transmitted Torque 49 ft-lb Outside Diameter Tolerance +0/-.002 in