Wide Compatibility:This dual flush valve kit is compatible with most 2-inch one-piece toilets. Before purchasing, please confirm your toilet's drain hole diameter is between 2.55 inches and 2.85 inches, tank height is between 10 inches and 13.5 inches , and tank lid hole diameter is between 2.2 inches and 2.6 inches. Compatible with most brands Easy Installation:This flush valve kit includes a Flush Valve, Fill Valve, Button. Installation is quick and simple. You can complete the installation in under 10 minutes, saving time and effort while restoring your toilet’s powerful flush. (Please check your toilet tank dimensions for compatibility before purchasing) Dual Flush Modes – Full & Half Flush:This flush valve offers two modes: Full Flush and Half Flush. The Half Flush mode saves water and reduces unnecessary costs, while the Full Flush mode ensures a thorough cleaning. Choose between the two modes based on your needs Premium Materials:The flush valve and button are made from high-quality ABS materials, ensuring durability and performance under varying water pressures and conditions. Additionally, the kit includes a thick rubber seal to significantly reduce the chances of leaks Toilet Repair Kit inside Tank offers effortless installation, making it ideal for various one-piece dual flush toilets. With just a screwdriver needed for the flush valve and no tools required for the remaining components, setup is quick and hassle-free. Additionally, the kit features an adjustable water level for customized performance