The cartridge assembly is the main gate that opens and closes to deliver the water to the toilet bowl; Installing our new flush cartridge assembly set when your toilet has problem with the water running and weak flushes, is a good option for you This cartridge set can help you fix your break toilet quickly Easy operate, directly replace, more, an option for household and toilets repair The C-100500-K flush cartridge set is suitable for flushmate M-101526-F, M-101526, M-101526, MA101526-F, M-102540-F, M-102540, M-102540, M-102540, and M-102540-C pressure assist tanks Made from robust, this flush gate cartridge assembly is engineered to withstand wear and tear, providing a cost-effective solution without compromising durability Flush gate cartridge assembly is designed for power flush toilet replacement part, works in 1.6 GPF, 1.28, and 1.0 GPF ( Gallon Per Flush) tanks, fits for 500, 501, 501A and 504 Series pressure assist tanks systems, Manufacturer: MZRAN