Taper Lock Tire Coupling Hub, Size - Tire Couplings WE4, Bore Type - Couplings Bushed Bore, Outside Dia. 2.60 In., Length through Bore 0.880 In., Rated Torque (In.-Lb.) 550, Max. RPM 7500, Keyseat Size (In.) None, Width (In.) .88, Height (In.) 2.60, Material of Construction Low Carbon Steel, Setscrew Location One Over Keyway, Max. Angular Misalignment 4 Degrees , Ideal For TL1008, Numerous Industrial Applications, Including Pumps, Motors, Compressors, Bushing Required 1008