These DOLPHIN TECH weight pouches provide a secure place on the tech BCD for the weight. Once mounted, they will not interfere with any movement while diving and the simple, fail-safe quick release  mechanism works every time. Weights stored securly in an inner weight pocket  • Outer pouch material: Heavy duty 1680D nylon  • Inner pouch material: 420D nylon  • Choice of Weight capacity: 4Kg or 7Kg 4Kg Pocket Dimensions Height 115mm Width 135mm Depth 35mm 7Kg Pocket Dimensions Height 190mm Width 145mm Depth 35mm