This is the ScubaPro SINGLE Replacement Weight Pocket for Knighthawk BC Features: Add or Replace Weight Pockets to Scubapro BCD Scubapro Quick-Release (QR) Weight Pockets: Fit-Variety of Scubapro BCD's Capacities: 10 lbs. or 12 lbs. (4.54 kg to 5.44 kg) Zippered Closure for Positive Weight Retention Except Soft or Hard Weights Durable Nylon Material with Taped and Sewn Seams for Strength and Durability Hardware: Impact Resistant Plastic ScubaPro SINGLE Replacement Weight Pocket for Knighthawk BC