ordinary pressure gauge are mainly used to measure the pressure of liquids, such as oil, water, gas. ordinary pressure gauge are mainly used to measure the pressure of liquids, such as oil, water, gas.Specifications:Nominal Dimensions:1-12"(40mm)2"(50mm)2-12"(63mm)3"(75mm)4"(100mm)5"(125mm)6"(150mm)Measurement Range:30inHg to 15000PSI 76cmHg to 1000KGCM2Case,Frame:Steel,Black Corrosion-Proof ...