Winters air over water test gauge. Applications: Residential and commercial air and water pressure testing. 2" Economy gauge. Schrader valve on socket. Case/Ring Material: Steel, painted black. Movement: Brass. Socket: Brass. Connection: 1/4" NPT Top Mount, with 3/4" female swivel hose connection. Accuracy: +/- 3-2-3%. Pressure Range: 0-200 psi.