Toilet Flush Valve Replacement: Designed for 3-inch two-piece toilet tanks, this flush valve is compatible with for models THU 440-1, THU 460.6d, THU 338-N, THU445.10F. It is not designed for use with one-piece toilets, ensuring an exact fit with the intended model. and Adjustable Design: This flush valve is made of sturdy ABS with a chemical-resistant silicone seal to prevent warping. The adjustable overflow tube can be cut to fit specific needs, providing a customizable solution for your toilet maintenance. Effective Leak Prevention: This replacement kit solves the most common problems associated with leaking toilets. By replacing worn valves and gaskets, it not only prevents water waste but also provides a long-term solution for leaking toilet tanks. Simple Installation Process: The flush valve kit is designed for quick and easy installation, typically taking less than 20 minutes to set up. This user-friendly design ensures that you can install it efficiently without professional