Aluminum 30 cuft cylinder - Perfect for Pony bottles, or for use as an emergency ascent bottle. 

Please Note that Flat rate shipping does not apply for heavy or oversize items such as cylinders, some fins, spearguns, etc. You will be contacted after you complete your order with a shipping quote (the additional shipping charge, if present on top of the 15 dollar flat rate) upon placing an order that includes heavy or oversize items