• Elastic crystal thread made of high-strength black invisible nylon fiber. • Elastic, durable, and easy to cut. • Suitable for weaving, tying, and adjusting. • Ideal for sewing and repairing bracelet jewelry, decoration, bracelet making, cords, sewing, pendants, knots, pearl chains, camping, gifts, crafts, and other ornaments. • Easy to make handmade hanging beads. • Easy to sew and roll, does not tangle, saves time, and improves efficiency. • Two rolls of black jewelry cord with a diameter of 0.8 mm, each about 10 meters long.