5" Double Groove B Section 5L Sheave with 7/8" (0.875") H-Style Split Taper Bushing - 2BK52HCast Iron 5" 2 Groove Dual Belt B Section 5L Pulley w 7 8" Sheave Bushing Masterdrive dual groove 5" cast iron pulley sheave with 7 8" H bushing for B section belt. This is a high quality 2 piece pulley that measures 5" outside diameter and is designed to be used with an H style bushing. This bushing inserts into the center of the pulley and slides over the shaft. As you tighten down the bolts on the H bushing it will tighten down on the shaft, making