Product Description Blue Steel Faber HP Steel Tank Hot Dip Galvanized with Pro Valve Includes: Blue Steel PRO Valve, Tank, Current Hydro, VIP and Tank boot Faber Steel Cylinders Feature: 3442 psi (237 bar) working pressure Phosphatized-cleaned interior DOT SP13488 and TC SU7694-237 O2 cleaned for use with up to 40% pre-blended nitrox Includes rubber self-draining tank boot with round rim Inlet thread is standard �¾â??-14 NPSM Hot Dip Galvanized The most durable, corrosion-free exterior finish possible. The process involves submerging the cylinder into molten zinc. The zinc metallurgically bonds to the steel.