QUANTITY: necklace cord bulk includes 20pcs black waxed necklace cords, enough for your jewelry making projectMaterial:Waxed cotton material makes it lightweight, flexible and durable to use, and the imitation leather looking is cool to match your pendantsit also includes a lobster claw clasp and 2inch extension chain.You can adjust the length to fit your needExcellent Quality:All the black cords are well made and hard to break, they are stable for long time use.-made necklace so that you can simply add pendants, charms, beads or other jewelry findings to make your unique necklaceSize: 1.mm in diameter and 50.8cm in length, with an extra 5cm extension chainMaterial: Polyester fiber + alloyColor: BlackPackage Included:1 x set Beading Cords & ThreadsOnly 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.