Install this to replace missing or worn-out parts. Included with all applicable tub/shower valves, we know that sometimes little parts like these get lost or misplaced. That’s why Delta has made this kit available for the handy DIYer to order.For use with Delta tub and shower modelsSelf-lubricating O-rings provide years of worry-free useMade of durable materialKit contains 2 O-ringsGenuine Delta repair part covers parts and finish defects