| 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. | |  | | 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. | |  | |