Hytrel Spider Insert Coupling Size L225 Outside Diameter 4 31/32 in System of Measurement Inch Maximum Speed 4 600 RPM Horsepower @ 100 RPM 9.9 hp Spider Material Hytrel Maximum Torque 6 228 in-lb Parallel Misalignment 0.015 in Durometer Hardness 55D Angular Misalignment 0.5 Degrees For Minimum Hub Bore 3/4 in Application Cranes Generators Mills Color White Compatible Hub Manufacturer Part Number L225 Fail Safe Yes For Maximum Hub Bore 2 5/8 in