Dodge Timing Belt Pulley, Dyna-Sync Type KF1, Taper-Lock Bore Type, 7/8 to 3-1/4 in Bore Dia, 7.28 in Outside Dia, 6.685/3.5015 in, 24 Grooves, 7/8 in Pitch, 2.56 in Face Width, 7.28 in Flange Dia, 0.56 in Hub Projection, 3020 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