Urethane Spider Insert Coupling Size L099 L100 Outside Diameter 2 17/32 in System of Measurement Inch Maximum Speed 7 000 RPM Horsepower @ 100 RPM 0.77 hp Spider Material Polyurethane Maximum Torque 477 in-lb Parallel Misalignment 0.015 in Durometer Hardness 90A Angular Misalignment 1 Degrees Application Blowers Compressors Generators Pumps Color Blue Compatible Hub Manufacturer Part Number L099 L100 Fail Safe Yes For Maximum Hub Bore 1 3/16 in