Quality Uncompromised! Be on top of your game with Consistent Air Pressure! 68 Cubic Inch tank combined with the best regulator on the market. DXS air systems deliver unbeatable consistency in air pressure delivery. ASTM approved, our 2-in-1 regulators can toggle from 800psi to a low 450-550psi output in a few minutes (Low Pressure Kit sold separately). The DXS Regulator is equipped with the industry standard "QD Style" fill fitting, which allows your system to be refilled either on or off the marker. The DXS system may be filled with either compressed air or nitrogen. Approximately 1400 shots per fill. Rumor is these are just as fast on the recharge as Crossfires. The high quality Screw-In tanks by DXS are already set for action to screw into any standard ASA Adaptor. These tanks are becoming one of the most durable and popular tanks used! These are 5-year hydro test bottles.