[Connection] CGA-580 lnlet Connector fits standard Nitrogen, Argon, Helium, and lnert Gas Tanks fromany supplier. 1/4-lnch Male Flare Outlet Connection fits HVAC Charging Hoses for HVAC unit pressurechecking and purging. The hose will give you a safe distance to avoid injury. [Accurate Pressure Gauge] This pressure Nitrogen Requlator has two easy to read 2 inch pressuregauge with scratch-resistant plastic protective film and rubber cover Input: 0-4000PSl. Output:adjustable 0-400PSl. We can accurately read the index in the meter. NOTE: The gauge shows 600PSI thatyou can rate them at 400pSl, but they are able to go up to 600pSl. [Application] The Nitrogenr is a standard pressure control valve used to reduce the inputreclatorpressure from gas or liquid stored in a pressurized tank. lt is great for HVAC purge, pressure test for airbeer distribution. The accurate reading of Nitrogenconditioning.leakage tests, soldering and keaRegulator would help you to adjust pressure before HVAC purging. [Durable Construction] Our Nitrogen Reaulator is made of brass. durable brass piston desianeddiaphragm. This upgraded surface treatment process can keep good looking in long time. Precisionthread design ensures high sealing performance and avoids air leakage. You can adjust the nitrogenregulator smoothly and accurately through the T-handle to prevent galling. Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:As Shown Material:brass Package Contents: 1 * Nitrogen Regulator 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.