Urethane Spider Insert Coupling Size L150 Outside Diameter 3 47/64 in System of Measurement Inch Maximum Speed 5 000 RPM Horsepower @ 100 RPM 3.0 hp Spider Material Polyurethane Maximum Torque 1 860 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 L150 Fail Safe Yes For Maximum Hub Bore 1 7/8 in For Misalignment Type Angular Parallel