Replacement flush valve assembly for drain hole, compatible with diameters from 2.56" to 2.95" (65 to 75 mm), for repairing dual one-piece flush valves

【Optimal Performance】Thanks to its high-density, elastic, and durable rubber O-ring, this dual flush valve ensures a perfect seal and eliminates any risk of leaks. 【Dual Adjustment and Buttons】The half-full/full adjustment (saving 0.3/1 liter of water) allows you to save water and energy. The two flush buttons (full/half-flush) optimize water consumption. This white ABS flush valve, with its sliding adjustment system, helps reduce your water consumption. 【Reliable Locking】The stainless steel hook lock underneath provides reliable locking force, corrosion resistance, and exceptional durability. 【Compatibility】Fits one-piece toilet tanks with a diameter of 65 to 75 mm (2.56 to 2.95 inches). Compatible with toilet tanks 30 to 36 cm (11.81 to 14.17 inches) high. 【Premium Material】 Made of high-quality plastic, this flush button is corrosion-resistant, strong, durable, and offers a long service life.