This cylinder air pressure gauge is make of Stainless Steel that is plated, so it is not easy to be damaged Wide ranges: This air pressure meter can measure from 0 to 350bar, meeting your different diving needs This diving cylinder pressure meter is anti-corrosions, and sturdy, and is a good option to replace a worn or damaged : This diving bottle pressure meter is designed with a threaded interfaces, so you can easily connecting This pressure gauge is designed to measure and display the cylinder air pressure