Oil Impregnated Spider Insert Coupling Size FC12 Outside Diameter 1 1/4 in System of Measurement Inch Maximum Speed 1 750 RPM Horsepower @ 100 RPM 0.32 hp Spider Material Bost-Bronz Maximum Torque 200 in-lb Parallel Misalignment 0.001 in Angular Misalignment 0.5 Degrees Color Bronze Compatible Hub Manufacturer Part Number FC12 Fail Safe Yes For Misalignment Type Angular Parallel Horsepower @ RPM 3.6 hp @ 1150 RPM Maximum Operating Temperature 250 Degrees F