1.pressure gauge Case Materials:Steeland Stainless Steel. 2.Dial size: 1.5 , 2, 2.5 3,3.5,4, ... 6 inch 3.Mounting: NPT. ZG1 Pressure Gauge our gauges widely used in oil industry, medical industry, food industry, machinery ... are availableCase Materials: Plastic, ABS, Steel, and Stainless Steel. 2.Dial size: 1.5 inch, 2 inch, 2.5 inch, 3 ...