Hytrel Spider Insert Coupling Size L099 L100 Outside Diameter 2 17/32 in System of Measurement Inch Maximum Speed 7 000 RPM Horsepower @ 100 RPM 1.8 hp Spider Material Hytrel Maximum Torque 792 in-lb Parallel Misalignment 0.015 in Durometer Hardness 55D Angular Misalignment 0.5 Degrees For Minimum Hub Bore 7/16 in Application Cranes Generators Mills Color White Compatible Hub Manufacturer Part Number L099 L100 Fail Safe Yes For Maximum Hub Bore 1 3/16 in