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