The product is a Genuine GM Crankshaft Outer Pulley designed specifically for 1996-2002 Chevy Vortec 4.3 engines. It is a used original equipment manufacturer (OEM) part, making it a reliable choice for those looking to replace their existing pulley with a high-quality, genuine part from the manufacturer. The pulley is compatible with various Chevy and GMC models, including C1500, K1500, Safari, Jimmy, and Sonoma trucks, as well as Chevrolet Blazer and Express vans, making it a versatile option for a range of vehicles. With its durable construction and precise fit, this pulley is an essential component for ensuring the proper functioning of the serpentine belt system in your vehicle.