This dual flush valve replacement kit is designed to work with most 2-piece toilets, featuring a 3 in. drain hole diameter compatibility. It includes essential components such as a flush valve, push button, mounting bolts, and a rubber seal, simplifying installation and reducing the need for additional parts. The kit offers 2 flush modes: half flush for water conservation and full flush for thorough cleaning, allowing users to choose based on their needs. Made from high-quality ABS materials, the flush valve and push button ensure durability under varying water pressures, while the thick rubber seal helps prevent leaks. Additionally, the flush valve is adjustable, letting you customize water volume for both flush modes to manage resources more efficiently. Material: Plastic.