Product Description High quality Luxfer Limited 106 c.f. composite scuba cylinder features aluminum shell interior with hoop wrapped fiberglass exterior. Carry more air in a smaller bottle with extra high 4350 psi working pressure. Cylinder size is 7.39" diameter x 26.1" length (about the same size as an aluminum 80 cf scuba cylinder) with 7/8"-14 UNF threads. The Luxfer Limited 106 cylinder has excellent in-water buoyancy characteristics: -4.8 lbs when full, +2.1 lbs at 500 psi. Includes XS Scuba 300 Bar DIN valve. NOTE: Composite cylinder requires 3 year hydro interval, 15 year service life. Air service only. Not for use in Canada.