JA Bushings Sold Separately Here:https://www.voodoosprockets.com/product-category/quick-detachable-qd/ja-qd-bushings/ See Images for more Specs 3VJA Single Groove QD Sheaves are precision-engineered components designed for use with 3V section V-belts in power transmission systems. These sheaves feature a single groove for efficient belt engagement and a Quick Detachable (QD) bushing system, which allows for easy installation, removal, and secure mounting on various shaft sizes. Made from high-quality cast iron or steel, they are built for durability and resistance to wear. These sheaves are commonly used in HVAC systems, industrial machinery, and agricultural equipment, ensuring reliable torque transfer and smooth operation. They are available in multiple diameters to accommodate different speed and load requirements.