This triple-protected finish provides long-lasting durability. The process includes a zinc galvanizing spray, followed by an epoxy paint and then a top coat of polyurethene. The result is a beautiful cosmetic finish. - 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 self-draining tank boot with round rim- Inlet thread is standard 3/4"-14 NPSM . Includes XS Scuba PRO valve with PVD finish and safety handwheel