Fluidmaster 550DFRK-3 Dual-Flush Complete System, Plastic, For: Most Toilet with 2 in Flush ValvesThe Fluidmaster Duo Flush gives you a tool to help save more water than any other Dual flush system on the market. The Dual flush system retrofits into any 2 in toilet tank and is proven to use up to 45% less water than the original tank parts. It also has been shown to improve flushing power on the full flush, so you will actually see better performance than before. A Dual flush tank lever is included with this system. Unit: EA UPC: 039961010100