The product is a set of Shimano bottom bracket cups with a 1.37x24 threaded design, specifically designed for English (BSA) bottom bracket shell type. It includes the bottom bracket cups and a lockring, providing a complete solution for replacing or upgrading the bottom bracket on a bicycle. Shimano is a well-known brand in the cycling industry, known for producing high-quality and durable components, making this product a reliable choice for cyclists looking to maintain or enhance the performance of their bike. Extra set of bearings included.