Urethane Spider Insert Coupling Size L190 Outside Diameter 4 15/32 in System of Measurement Inch Maximum Speed 5 000 RPM Horsepower @ 100 RPM 4.1 hp Spider Material Polyurethane Maximum Torque 2 589 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 L190 Fail Safe Yes For Maximum Hub Bore 2 1/8 in For Misalignment Type Angular Parallel