Our Gun Metal Plated Small Curb Chain has 4mm twisted, flat oval links. The chain is made from solid, naturally hypo-allergenic brass which is electro-plated in Nickel Free Gunmetal Black. When used in jewelry design, curb chains lie flat when worn. Use this chain in your exclusive necklace, bracelet, anklet or earring designs. use multiple lengths to create a layered design. Dangle your favorite charms, beads or baubles from the open links. All links on this chain are soldered closed.