This inline valve are commonly used on Inspiration rebreathers. The valves have the bump guard on the bottom just like the original ones that come with your Inspiration Rebreather. These are your standard ¾ valves that fit aluminum tanks and steels.Supplied with compact sealed 40mpa/6000psi Gauge, Bleed Valve, Hose,The DIN fitting(G5/8") will fit both 300 and 232 Bar diving cylinders.The hose terminates with a stainless quick coupler socket,if you want to refll your pcp air rifle, need a male plug fitting with 1/8"bspp female threads,or a charging probe with male plug fitting.Rated for 300bar/4500ps,The hose is reinforced with springs and 24" / 500mm long.48mm big luminous gauge,Dual scale 0 - 40 mpa and 0 - 6000 psi stainless sealed gauge, ideal for outdoor use.Knob type bleed valve,bleeding is very smooth