The Hlowfane Air Compressor Rebuild Kit is designed to be compatible with Wabco 91 Series models, offering a high-quality fixing bolt made from durable cast iron. The kit includes essential items such as a gasket and piston rings, ensuring a performance-enhancing rebuild of the air compressor. With a vintage part designation of "No" and an origin in China, this aftermarket product is a reliable choice for those looking to maintain or upgrade their vehicle's engine parts.