Dodge Sheave, Block Type E1, Taper-Lock Bore Type, 1/2 to 1-1/4 in Bore Dia, 2.8 in Outside Dia, 2-3/4 in, 4 Grooves, 1.91 in Face Width, JA Bushing, For Use With: 3V Cross Section Belts, Cast Iron, Gray Isolates shock loads and vibrationMinor misalignment capabilityDrive ratios of 6:1 or more possibleLow maintenanceNo lubrication requiredTypically 95% efficiency can be obtained