6000psi Tank Valve with Dual High Pressure Gauge, one gauge shows the pressure inside the tank. Constant air valve/air fill station. M18x1.5 male Inlet thread 50cm high pressure charging hose How it works?: Turn off the ON/OFF Turn the release valve clockwise to the lowest point, Install it into your bottle,then you can connect the 8mm quick plug to your other equipment, Turn on the ON/OFF to use it. When you stop using it, turn off the ON/OFF first and turn on the release valve counterclockwise to deflate. After the deflation is complete, you can remove your device. Pipe pressure: : 1600bar/WP: 630bar Colour: Black Material: Stainless Steel+Copper Package Contents: 1 * Adapter Only the above package content, other products are not included. Note: Light 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.