gas pressure gauge 1 Case with rolling 2 Dial: 1.5" 2", 2.5", 3", 3.5", 4", 6" ... 1/2 gas pressure gauge1) Case: steel with bronze plate2) Dial: 1.5", 2", 2.5", 3", 3.5", 4", 6 ... tube: brass, phosphor bronze, stainless steelc) Connection: brass, stainless steeld) Dial and pointer: aluminume) Window: glass, polycarbonate7) Pressure range: vacuum, compound ...