The AL40 is the versatile small cylinder that technical and recreational divers reach for when an S80 is too much and an AL13 isn't enough. At 40 cubic feet, it handles stage and deco gas for short technical dives, works as a pony bottle with meaningful gas volume, and is frequently used for confined recreational diving where a full AL80 would be excessive. Compact enough to handle easily but substantial enough to provide real gas reserve. 40 cubic foot capacity — the sweet spot between AL13 and AL80 Popular for stage, deco, and pony bottle applications More compact than an AL80 — easier to handle and rig Aluminum construction — manageable buoyancy characteristics Available in Brushed finish Depth Finder's Scuba can fill and analyze your AL40 — air, nitrox, and custom mixes available.
