Save water and save money, while solving common flush and running toilet problems with Fluidmaster's 502C PerforMAX 2” water-Saving Flapper. Featuring the innovative PerforMAX water saving adjustable dial that optimizes performance and water usage with every flush. This high-quality toilet flapper is built with corrosive resistant materials for a long life, and a solid frame for a secure seal every time. The universal design fit’s most 2” flush valve toilets, from 1.28 HET to 3.5 GFP designs. Save on DIY repair time. The 502C features a highly efficient design, which also offers simple and easy installation. Fluidmaster’s 502C PerforMAX Adjustable 2” Toilet Flapper, the top choice for flush efficiency.