IDC Select® classical A/B combination, C and D sheaves, and narrow 3V, 5V, and 8V sheaves are available in QD® bushing designs. They are precision machined from 30 gray cast iron, statically balanced, painted with a baked enamel finish and individually packaged. IDC Select® Sheave, Heavy Duty Type A-1 Solid, QD® Bore, 7-1/2 in OD, 7.4 in Pitch Diameter, 6 Grooves, 4-7/6 in Face Width, SF Bushing, For Use With: 5V-Cross Section V-Belts, Cast Iron, Baked Enamel