Pure Energy 48 Cubic Inch /3000psi, High Pressure Air / N2 Tank System with Stainless Steel Valve. Consistent Flow Technology piston Mil-spec Belleville springs Dual safety rupture plugs for both bottle and downstream safety Mechanical gauge Nickel plated brass bonnet Certified fill nipple and dual locking set screws Approximately 500 shots per fill. All tanks are shipped empty. PLEASE NOTE: Due to shipping restrictions this item cannot be returned.