with Clamp and Flange Pressure guage with Stainless steel Clamp and Flange, an especial G1/8 brass connection. with Clamp and Flange Pressure guageSize: 2.5"Case: Stainless steelClamp and Flange: stainless steelConnection: back, brass,especial G1/8The third advantage of our company is the neat and clean work environment. with Clamp and Flange Pressure guage