Plumbcraft Eco Water Saving Toilet Flush Valve Standard 2-inch, Fits Most Toilets Includes everything needed for a complete flush valve replacement Includes flush valve, flapper, chain, water tight bowl gasket, hardware, and detailed instructions Adjustable flapper water saving dial allows you to save up to 54% water per flush Fits most toilets including: American Standard, Kohler, Glacier Bay, Mansfield and many more Replaces worn flush valve unit. Ultra strong seal provides leak free operation saving water/money