TRAP Timing Belt Pulley For Belt Series H For Belt Width 2 in For Bushing Size SH For Bushing Type Quick Detachable For Use With 0.5 in Trapezoidal Pitch Material Steel Minimum Bore Diameter 1/2 in Number of Teeth 20 Outside Diameter 3.256 in Pitch 0.5 in Pitch Diameter 3.183 in Face Width 2.344 in Features Built for High-Torque Low-Speed Applications Outperforms Industry Standards Superb Flexibility Finish Black Oxide For Belt Trade Size H Number of Flanges 2