Oil Impregnated Spider Insert, Coupling Size FC45, Outside Diameter 4 1/2 in, System of Measurement Inch, Maximum Speed 100 RPM, Horsepower @ 100 RPM 17.5 hp, Spider Material Bost-Bronz, Maximum Torque 11,000 in-lb, Parallel Misalignment 0.001 in, Angular Misalignment 0.5 Degrees , Color Bronze, Compatible Hub Manufacturer Part Number FC45, Fail Safe Yes, For Misalignment Type Angular, Parallel, Horsepower @ RPM 17.5 hp @ 100 RPM, Maximum Operating Temperature 250 Degrees F WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov -