[Connection] CGA-580 Inlet Connection fits standard Nitrogen, , Helium, and Inert Gas Tanks from any supplier.1/4inch Male Flare Outlet Connection fits HVAC Charging Hoses for Purging ,Pressure Testing and High-pressure lines. [Accurate Pressure Gaugev] The Nitrogen Gas Regulator has two Easy to read pressure gauge,covered with scratch- plastic protective film and rubber cover.Input: 0-4000PSI.Output: adjustable 0-600PSI.The display show 800PSI that you can rate them at 600PSI, but they are to go up to 800PSI. [ MATERIAL] It is made from solid brass material, which is sturdy and . It comes with a valve. In this way, it can automatically release certain pressure and avoid damage due to high pressure. [USER-FRIENDLY DESIGN] This nitrogen regulator possesses an exquisite outer appearance with a better gas tightness characteristic.The reading displays in a more accurate way. Moreover, it not cause any problems like air leakage or overall inaccuracy of reading. [LARGE T-STYLE HANDLE] The nitrogen pressure gauge equipped with a T-style handle in a large size is very easy to adjust and stabilize. It is great for HVAC purging, inertization, pressure test, brazing, leakage test and soldering. Note:Due to different production batches, the product appearance color slightly, which not affect the use. Colour:Gold & Yellow & Black Material:Plastic+Copper+Rubber Package Contents: 1 * Nitrogen Regulator 1 * hose 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.