Polyurethane Spider Insert Coupling Size FC15 Outside Diameter 1 1/2 in System of Measurement Inch Maximum Speed 3 450 RPM Horsepower @ 100 RPM 0.37 hp Spider Material Polyurethane Maximum Torque 250 in-lb Parallel Misalignment 0.002 in Angular Misalignment 1 Degrees Color Tan Compatible Hub Manufacturer Part Number FC15 Fail Safe Yes For Misalignment Type Angular Parallel Horsepower @ RPM 4.0 hp @ 1150 RPM Maximum Operating Temperature 200 Degrees F