This TB Woods 3879 sheave is a high-quality product made of metal material with a bore diameter of 2 inches and a roller diameter of 6.4 inches. It is designed to fit cam followers and is ideal for use in industrial automation and motion controls. The sheave is brand new and still in its original packaging, making it a great choice for those looking for a reliable and durable product. Purchase with confidence knowing that you are getting a top-quality product from a trusted brand in the industry.