TRAP Timing Belt Pulley Bore Diameter 5/8 in For Belt Series L For Belt Width 1/2 in For Use With L Belts Material Steel Maximum Bore Diameter Not Applicable Number of Teeth 16 Outside Diameter 2.125 in Pitch 0.375 in Pitch Diameter 1.91 in Bore Type Fixed Face Width 0.75 in Features Built for High-Torque Low-Speed Applications Outperforms Industry Standards Superb Flexibility Finish Black Oxide For Belt Trade Size L Hub Diameter 1 7/16 in Hub Projection 1/2 in