Interstate Pneumatics VR161 - In Line Needle Valve 1/4" FPT x 1/4" MPT - w/Gauge 1.5" 0-160 PSI Inlet Thread: 1/4 Inch NPT Female Outlet Thread: 1/4 Inch NPT Male Gauge: 1-1/2 Inch and 160 PSI Maximum Service Pressure: 175 PSI