This is the Oceanic Tank Band Pouch PAIR for Original Weight Release System Features: The pockets are sold as a pair Designed to fit the tank cam straps on BCD Will fit any BCD that uses a standard 2 inch nylon web tank strap with cam buckle Made of heavy duty nylon with corrosion resistant zipper closures Each pocket can hold up to 5 pounds (2.2 kg) of weight Large grommet at the base of each pocket that allows water to drain out Pockets measure 5.25 x 4" x 1.5" You already know the importance of proper weighting in scuba diving but concentrating all the weight needed in one area can lead to bad in-water body positioning. Strategic distribution of dumpable and non dumpable trim weights can help alleviate this problem. This is the purpose behind the Tank Band Weight Pockets by Oceanic. "