Dodge Timing Belt Pulley, Dyna-Sync, Taper-Lock Bore Type, 1/2 to 2-1/8 in Bore Dia, 6.02 in Outside Dia, 5.73 in, 48 Grooves, 3/8 in Pitch, 3/4 in Face Width, 6.02 in Flange Dia, 1 in Hub Dia, 1/2 in Hub Projection, 2012 Bushing Synchronized and no-slip transmissionNo lubrication requiredApproximately 98% efficiency can obtainedLow maintenanceVirtually no backlashConstant linear velocity8.5:1 drive ratioEasy On/Off operationFlange design standard on drive size