Tiberius FS Hero 45k HPA Tank (77ci) 77 cu 4500 PSI Tri-Label UN ISO Certification  DOT/TC/Pi Carbon Fiber Cylinder Lifetime use bottle (endless hydro-testing on bottle) 30% Lighter than conventional cylinders Durable Gel Coat, Dual Burst Discs for added Safety Tool-less 360 Fully Rotational Regulator, Re-buildable and Adjustable Output Pressure