American Standard 738920-0070A 3.5-inch Flapper with 2 Extra Seals

Gravity-tank flappers and seals cover the outlet where water leaves the tank to fill the bowl of a gravity-flush toilet. The flappers lifts up to release water for flushing and reseats after flushing to hold water within the tank. The seals are rings that form a seal around the flappers. These parts are used to replace worn or warped flappers and seals that no longer seal properly and allow toilets to run continuously. The valve has a removable nipple so you can replace the silicone seals.