Describe: 30Mpa Tank Valve with High Pressure Gauge on the Hand Constant air valve/air fill station M18x1.5 or 7/8-14UNF male Inlet thread Tank ON/OFF valve Comes with safety burst valve Fit for high pressure cylinder Tank with x 1.5 / 7/8-14UNF thread Used as spare parts for PCP, Scuba Diving, etc The gauge only shows the pressure of the inner tube when charging. It does not always show the pressure inside the tank. There is a hole in the back, with 1/8inch BSP thread, can be fit for a gauge to always show the pressure inside the tank Color: Black & Silver Material: metal Package Contents: 1 x Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.