Deck-mounted - the legs come with securing nuts , The left control knob controls the water on/off , The right control knob is the temperature control, There is an override stop button set at 38 Celsius degrees , Diffuser fitted in the spout for non-splashing spray , Ceramic Cartridge - allowing exact control the water flow and temperature , Button on handset bracket to slide the holder and adjust the angle , Subject to a minimum pressure of 0.5 bar to maximum 3 bar , UK standard size fitting