Oil Impregnated Spider Insert Coupling Size FC25 Outside Diameter 2 1/2 in System of Measurement Inch Maximum Speed 870 RPM Horsepower @ 100 RPM 2.9 hp Spider Material Bost-Bronz Maximum Torque 1 800 in-lb Parallel Misalignment 0.001 in Angular Misalignment 0.5 Degrees Color Bronze Compatible Hub Manufacturer Part Number FC25 Fail Safe Yes For Misalignment Type Angular Parallel Horsepower @ RPM 24.8 hp @ 870 RPM 8.6 hp @ 300 RPM Maximum Operating Temperature 250 Degrees F