Buna N Spider Insert Coupling Size L190 Outside Diameter 4 15/32 in System of Measurement Inch Maximum Speed 5 000 RPM Horsepower @ 100 RPM 2.7 hp Spider Material Buna-N Maximum Torque 1 726 in-lb Parallel Misalignment 0.015 in Durometer Hardness 80A Axial Motion 0.015 mm Angular Misalignment 1 Degrees Application Close Coupling L-Type Color Black Compatible Hub Manufacturer Part Number L190 Fail Safe Yes For Misalignment Type Angular Parallel