... 1/2 gas pressure gauge1) Case: steel with bronze plate2) Dial: 1.5", 2", 2.5", 3", 3.5", 4", ... PT)5) Connection mounting: bottom, top, left, right, center back, offset back6) Material:a) Case and rolling bezel: steelb) Bourdon tube ... : brass, phosphor bronze, stainless steelc) Connection: brass, stainless steeld) Dial and pointer: aluminume) Window: glass, polycarbonate7) Pressure range: vacuum, ...