Universal design to fit most popular brands of 1.6 gallon toilets. Made of harsh chemical-resistant red material. Adjustable sealing ball to match OEM (Original Equipment Manufacturer) settings for 1.28 GPF, 1.6 GPF, 3.5 GPF, and 5 GPF toilets. Allows for optional water savings by decreasing the water amount flushed. Adjusts in seconds and installs in minutes. May also be used on 3-1/2 or 5 gallon toilets as a water saving device. 5 year guarantee.