GOVALVE Shower speed control valve is made of high quality stainless steel, rust-proof, corrosion resistant, high temperature resistant, and adaptable to various use environments. Note: If there is a leak, you can purchase a seal and PTFE tape to use with it. Any problems encountered during use are welcome to seek our support! Shower Flow Control Valve made of high quality 304 stainless steel, rust-proof, high temperature, pressure resistant. Standard 1/2" female x male NPT threads, match to shower connectors in United States Water supply switch easy to open, turn the handle a quarter turn to open or close the valve. Valves are used to open/close or regulate the flow of water Lead-free, widely used in bathrooms, kitchens, RVs, gardens, etc.