Suitable for use with most standard 2-piece toilet systems in the UK, which have a 2-inch outlet The Perfect dual flush valve replacement system for two-piece toilet systems, including entire kit components and replacement flush buttons Featuring an auto-off toilet fill valve, this will help you to save water and set your desired water levels easily. Easy to instal and set up for competent DIY'ers, this is straightforward to set up and use and can be installed quickly. Made from high-quality plastic, which is anti-corrosive and will not rust like metal counterparts, Manufacturer: UltraByEasyPeasyStore