A single 47mm metal trailer hub cap. This hub cap has an internal fit, meaning it slots into the hub centre rather than over it. It has an external size of 47mm and will fit hubs with a 47mm internal diameter. Commonly used on trailers with Avonride hubs or axles, but can also be fitted to many other trailers. It is essential for protecting wheel bearings from dust and grit, which can significantly shorten their lifespan. Manufactured from steel for strength and durability, and zinc plated for corrosion protection. This listing is for one metal hub cap.