1763 Three Rung Foam Scuba Tank Rack. The scuba tank rack lays on the deck or ground and keeps your tanks from rolling around. It holds 2 tanks on the bottom and you can stack another tank on top. It can also be used as a float for lounging around on in the water when not in use as a scuba tank rack. Includes a loop for easy hanging storage. White with blue cord, 3″ diameter x 11.5″ foam, 27″ over all length. Made in The USA.