Fill valve & flapper kit. The only dual shut-off fill valve for flapper leaks and hang-ups. Minimizes costly water loss from leaks. Saves water due to leaks by not refilling the tank during a slow flapper leak. Automatically shuts off if flapper is stuck open. Proven quitest. Height easily adjusts from 7-3/4" to 13-1/2" to fit most toilets. 5 year warranty.