Dodge Dyna-Sync Timing Belt Pulley, Block Type KF-1, Taper-Lock Bore Type, 1/2 to 2-1/8 in Bore Dia, 4.084 in Outside Dia, 4.138 in, 1/2 in Pitch, 3.38 in Face Width, 4.78 in Flange Dia, 1.06 in Hub Projection, 2012 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