[High Quality] These black cord necklaces with clasp are made of braided wax rope and premium zinc alloy, well made with smooth edges won't hurt your skin; strong and durable, can keep your pendant well; soft and flexible, good drapability, beautiful appearance, adds charm to you[Easy to Use] This necklace cord is equipped with a lobster clasp and alloy extension chain, which is easy open to close and you can adjust the length according to your needs. If you want to add some beads, you can remove the extension chain first, string the beads in, and then connect the extension chain again[Wide Application] Our necklace cord is suitable for jewelry making, such as beads necklace, crystal pendant bracelet, metal pendant bracelet, or double tie necklace (made together by two necklace ropes). The necklace cord is perfect for jewelry production of various styles, the best choice for manual DIY[Perfect Gift] This waxed cord necklace is 20 mm in diameter and 177 inches in length, plus a 197 inches metal extension chain, a set of 50 pieces, which can meet your daily use. Our necklace cord is definitely the best gift for your family and friends on birthdays, Christmas, Thanksgiving and other festivalsColour: blackMaterial: wax thread + zinc alloyPackage Contents:50 x Necklace CordOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.