HTD Timing Belt Pulley For Belt Series HTD For Belt Width 15 mm For Bushing Size SDS For Bushing Type Quick Detachable For Use With HTD Belts Material Cast Iron Maximum Bore Diameter 2 in Minimum Bore Diameter 1/2 in Number of Teeth 72 Outside Diameter 4.67 in Pitch 5 mm Pitch Diameter 4.511 in Face Width 0.84 in Features Built for High-Torque Low-Speed Applications Outperforms Industry Standards Superb Flexibility Finish Black Oxide For Belt Trade Size HTD