Stop a running toilet and save water with Fluidmaster’s PerforMAX Water-Saving, Adjustable Flapper Chlorine and hard water resistant** Universal – Fits most 2” flush valves Adjustable dial to control amount of water during flush and save water The higher the number on the flapper, the longer the flapper will stay open. Solid frame for the best seal – no twisting. 6 Pack. Best for ALL toilets, 1.28, 1.6, 3.5+ GPF (gallons per flush). Fluidmaster sets the high performance standard with the 502 PerforMAX Water-Saving, Adjustable Flapper. Fully adjustable for a customized flush. Simply turn the dial left for more water per flush, or right for less depending on your needs. Quickly save water and improve flush performance. Built to last, the 502 is our longest lasting flapper. Only Fluidmaster has toilet flappers with built-in Microban protection. Not just simply a coating, Microban is specifically built into the construction of our flappers to fight flapper breakdown and combat bacteria for a long lifespan. The Fluidmaster 502 Flapper quickly replaces and upgrades old, or corroded 2” toilet flappers with a high performance and durable replacement. ** DO NOT USE IN-TANK DROP-IN TOILET BOWL CLEANERS CONTAINING BLEACH OR CHLORINE. USE OF SUCH PRODUCTS WILL RESULT IN DAMAGE TO TANK COMPONENTS AND MAY CAUSE FLOODING AND PROPERTY DAMAGE. 6 pack.