This works specifically with Delta 17/18 series diverter valves. The Danco Cartridge for Delta Tub & Shower, specifically designed for the 17 Series after 4/2006, is a high-quality plumbing fixture replacement part. Manufactured by Danco, a trusted brand in the industry, this cartridge ensures optimal performance and durability for your tub and shower system. Whether you are looking to repair or upgrade your plumbing fixtures, this product provides a reliable solution for maintaining your bathroom's functionality.