[Simple Operation]Our PCP air tank comes with a professional air filling system with regulator gauge to check the working pressure.Hose fittings(included)features a 1/8 female quick-disconnect. It can be directly connected to the air compressor for filling(thread size:M18*1.5).Good quality carbon fiber tank applied to loading gas,PCP paintball,airguns charging,Scuba,underwater breathing,clean energy,emergency escape,snorkeling diving,chemical industry,shipping,medical care and fire fighting,etc. [Large Capacity]6.8L large capacity!no longer worried about the shortage of gas when youre outdoors.Its workmanship is excellent that full-wrapped carbon fiber and glass fiber winding,making it lighter while having higher strength. [Stable Performance]Carbon fiber composite air tank,which is a newly upgraded cylinder.Compared with traditional gas cylinders,it has the advantages of light weight,long service life,4500PSI high performance and good-looking appearance.It can reach 50Mpa according to our product testing and working pressure is 300 Bar. [High Quality]We used 6061 Aliuminum Alloy as the material for the inner layer and the outer layer is wrapped in high-quality glass fiber and high-performance carbon fiber.Wear-resistant,impact-resistant.It ensured that the holding gas is clean and pure. [Professional Manufacturer]Our company is one of the most professional manufacturer and supplier of air compressor in China and we provide all-round after-sales warranty and technical support(24 hours online service)