They come with a sturdy lever which is easy to operate and requires a quarter turn providing ease of use, thanks to the ceramic disc cartridge. Made from solid brass, they are finished in 40 microns of chrome to ensure a highly reflective mirror finish. They also come with a 10 Year Warranty for peace of mind. Specifications Lever Handles Stylish Design Solid Brass with a Chrome Finish 1/4 Turn Ceramic Cartridge - assure lifetime drip free and allowing exact control the water flow and temperature UK standard size fitting Does not include waste Technical Information: Suitable for the following water systems: Combi-boilers High pressure systems Gravity Fed Systems (May require a pump) Subject to a minimum pressure of 0.5bar to maximum 3bars (Recommended pressure is 1.0bar)