The Fluidmaster PerforMAX Universal Fill Valve and 2" Flapper Kit is a comprehensive solution designed to restore optimal performance to 2-inch flush valve toilets, including popular brands. This kit includes the PerforMAX high-performance fill valve, which features adjustable tank and bowl water level settings, allowing for customized water usage per flush. The included 2-inch flapper is designed to fit most 2-inch flush valves and is constructed with corrosion-resistant materials to ensure longevity. The EZ-Twist fill valve height adjustment ranges from 10 to 15 inches, providing flexibility to fit various toilet tank sizes. This kit offers a reliable and efficient solution for addressing common toilet issues such as running water, weak flushes, or slow tank refills.