Built in Italy by Faber Cylinders with 40 years of experience. DOT Special Permit #13488 and Transport Canada #SU7694-237 approved. Oxygen cleaned for use with up to 40% pre-blended Nitrox. Exclusive Phosphatized-cleaned internal surface. Triple-protected zinc spray plus epoxy and polyurethane painted finish for long lasting durability. Manufactured using the deep draw process with Chromium Molybdenum steel. Includes XS Scuba PRO valve with PVD finish and safety handwheel. High quality, injection-molded custom tank boot with round rim. 3442 psi working pressure.