Dodge Sheave, Arm Type D3, QD Bore Type, 1/2 to 2-15/16 in Bore Dia, 19 in Outside Dia, 18.95 in, 4 Grooves, 1.9 in Face Width, SF 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