The material is 59A brass, cast in one piece, which is better than stainless steel. It can pass level 10 electroplating. Copper ions can kill 99% of bacteria in the water. There is no need to connect to the power supply or install batteries, just connect the water pipe to use, with a two-year standby time, safe and environmentally friendly. Equipped with a water regulating valve to adjust the hot and cold water. Swiss NEOPERL bubbler.