Detailed Product Description pressure gauge: · Case sizes: 1.5", 2", 2.5", 3.5", 4", 4.5", 6", 8", and 10" · Case material: steel case, steel black case, steel chrome plated case, steel gold plated case, · Flange: Both front or black flange are available with black steel, chrome-plated steel or stainless steel. · Tube and socket: brass, stainless steel, steel with nickel plated, 316 stainless ...