Buna N Spider Insert Coupling Size L099 L100 Outside Diameter 2 17/32 in System of Measurement Inch Maximum Speed 7 000 RPM Horsepower @ 100 RPM 0.66 hp Spider Material Buna-N Maximum Torque 318 in-lb Parallel Misalignment 0.015 in Durometer Hardness 80A Angular Misalignment 1 Degrees Color Black Compatible Hub Manufacturer Part Number L099 L100 Fail Safe Yes For Maximum Hub Bore 1 7/16 in For Misalignment Type Angular Parallel