Cast Iron 3.15" Single 1 Groove Belt B Section 5L Pulley w/ 1-1/8" Sheave Bushing Masterdrive single groove 3.15" cast iron pulley/sheave with 1-1/8" H bushing for B section belt is a high-quality 2-piece pulley that measures 3.15" 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. This style of pulley is much more secure than a standard single-piece pulley. 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 and is 1/2" wide. Specifications: • Solid Steel Bushing • Single Groove Pulley • 1-1/8" Bushing Included • For Use on 1-1/8" Shaft • Outside Diameter of Pulley: 3.15" • High-Quality Cast Iron Construction • Accepts: B Section / 5L Section Belts