This 2 pack O ring is designed to fit a 45mm bath sink basin plug, with a size of 1.3/4 inch. Made from high-quality rubber, these O rings are durable and reliable for long-lasting use. Manufactured in the United Kingdom, this product ensures a secure seal to prevent leaks and water damage in your plumbing fixtures. Perfect for DIY plumbing projects, this O ring set is a convenient solution for maintaining your bathroom or kitchen fixtures.