Review on 🚽 American Standard 738920-0070A 3-Inch White Flapper Assembly, Ideal for Toilet Repairs, 3 in by Allen Hart

Seems good quality works well. Simply snap onto the flush valve body after removing the old damper. It's a hard plastic case with a softer silicone material for the actual seal. I've installed hundreds of valves and have learned to avoid all vinyl types for 3" valves as the water pressure tends to warp them over time causing them to sag in the center and leak water down the drain. a box like the ones you buy in the store. This is an American standard part but should fit any Thiole that uses a 3" baffle and has small lugs on the purge valve. Good price for an original part.