Oil Resistant Spider Insert Coupling Size FC45 Outside Diameter 4 1/2 in System of Measurement Inch Maximum Speed 1 750 RPM Horsepower @ 100 RPM 4.4 hp Spider Material Rubber Maximum Torque 2 800 in-lb Parallel Misalignment 0.002 in Angular Misalignment 1.5 Degrees Color Black Compatible Hub Manufacturer Part Number FC45 Fail Safe Yes For Misalignment Type Angular Parallel Horsepower @ RPM 51.1 hp @ 1150 RPM Maximum Operating Temperature 200 Degrees F