Cast Iron 5" 2 Groove Dual Belt B Section 5L Pulley w/ 1-1/8" Sheave Bushing Masterdrive dual groove 5" cast iron pulley/sheave with 1-1/8" 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 it much more secure than your standard 1-piece pulley system. This listing includes an H bushing to fit on a 1-1/8" shaft. The bushing is made of solid steel and precision machined to ensure high quality and secure attachment to your motor/engine shaft. This pulley accepts B Section also known as 5L series belts. These belts are 5/8" wide. This pulley will work with A Section belts, also known as 4; however, they will sit farther down in the groove, reducing your pulley size by 1/4" to 1/2" on average, depending on the size of the pulley. Specifications: Dual Groove Pulley Solid Steel Bushing 1-1/8" Bushing Included For Use on 1-1/8" Shaft Outside Diameter of Pulley: 5" High-Quality Cast Iron Construction Accepts: B Section / 5L Section Belts