Buna N Spider Insert Coupling Size L225 Outside Diameter 4 31/32 in System of Measurement Inch Maximum Speed 4 600 RPM Horsepower @ 100 RPM 3.7 hp Spider Material Buna-N Maximum Torque 2 340 in-lb Parallel Misalignment 0.015 in Durometer Hardness 80A Angular Misalignment 1 Degrees Color Black Compatible Hub Manufacturer Part Number L225 Fail Safe Yes For Maximum Hub Bore 2 5/8 in For Misalignment Type Angular Parallel