The DYE UL air tank is a composite bottle with a stainless steel PET-core.
That makes it ultra light.The Volume of this bottle is 1.2 liters (73ci) with 4500 psi (300 bar).It comes without a regulator.Technical details:Weight0,69 kgPressure300 barLength210 mmDiameter110 mmLifetime15 years (extendable twice for 5 years)