The Korky QuietFILL Platinum fill valve and 2 in. premium flapper kit combines the 2 most universal solutions to fit every popular toilet brand including: Kohler, TOTO, American Standard and all other brands. The QuietFILL Platinum fill valve adjusts to fit 99% of toilets while the included universal flapper adjusts to fit 1.28, 1.6, 3.5 and 5+ GPF (gallons per flush) toilets. A truly universal solution for all brands, ages and sizes of toilets.