|  | Luxfer 13 Cubic Foot Pony Bottle |  | 13 cubic foot tanks give you a good backup supply of air in a compact package. The tank measures 4.5 inches in diameter and about 16 inches long. | |  | Luxfer 19 Cubic Foot Pony Bottle |  | For a full 19 cubic feet of air, 19 cubic foot pony tanks measure just 20.5 inches by 4.5 inches. This makes for a compact tank with a lot of backup air supply. | |
|  | Luxfer 40 Cubic Foot Tank |  | For the security of extra air, and a redundent air supply at a low price. This bottle offers 40 cu ft. of extra air. Colors: Yellow Only. | |  | Luxfer 50 Cubic Foot Tank |  | This is the smallest of our tanks which is not considered a back-up or pony tank. This is an excellent tank for children just certified or adults doing shallow reef dives. | |