Sea Pearls lead weight is manufactured from lead that has been reclaimed from car batteries. The reclaimed lead is melted down and supplemented with small amounts of other elements to enhance its properties. This new alloy is then used to create the coated lead weights. You like the more traditional weight belt for several reasons. One, they increase your stability in the water, and two, they make handling your scuba system much easier because it's lighter out of the water. Sea Pearls coated weights are a long favorite of experienced divers. These weights are accurate and true weight, all corners and edges are round, and weights have curved inner surface to fit around you increasing the comfort of a weight belt. Weights are manufactured with antimony which is an alloy, to increase lead's hardness and mechanical strength, making them resistant to deformation. Vinyl coating is chemically bonded to the weight so they won't peel. Lace-thru sizes- 1, 2, 3, 4, 5, 6, 8, 10, and 12 lbs. (0 45, 0 9, 1 36, 1 82, 2 27, 2 73, 3 64, 4 55 and 5 45 kg) Weights are black in color. Proudly made in the USA