This is a replacement product for various shower and tub faucets. The cartridge is 40mm wide and has a seal on bottom that is pictured in the listing. This is a great value for repair a faucet versus replacing an entire shower. Replaced HJ-40 and JL01GJ Cartridges commonly found in Vima Decor, Huntington Brass, more. Manufactured by Hain-Yo in Taiwan.