Dodge Dyna-Sync Timing Belt Pulley, Block Type KF-1, Taper-Lock Bore Type, 1/2 to 1-1/4 in Bore Dia, 3.129 in Outside Dia, 3.183 in, 1/2 in Pitch, 3.38 in Face Width, 3.44 in Flange Dia, 0.94 in Hub Projection, 1215 Bushing, 3.38 in Overall Length, For Use With: 3 in W H-Belt Clean, compact Taper-Lock designEasy on/off operationFlange design standard on drive size