Buna N Spider Insert Coupling Size L050 Outside Diameter 1 1/16 in System of Measurement Inch Maximum Speed 18 000 RPM Horsepower @ 100 RPM 0.04 hp Spider Material Buna-N Maximum Torque 26 in-lb Parallel Misalignment 0.015 in Durometer Hardness 80A Angular Misalignment 1 Degrees Color Black Compatible Hub Manufacturer Part Number L050 Fail Safe Yes For Maximum Hub Bore 5/8 in For Misalignment Type Angular Parallel