enough for your jewelry making project makes it lightweight, flexible and durable to use, and the imitation leather looking is cool to match your pendants it also includes a lobster claw clasp and 2inch extension chain. You can adjust the length to fit your need Excellent Quality:All the black cords are well made and hard to break, they are stable for long time use. Ready-made necklace so that you can simply add pendants, charms, beads or other jewelry findings to make your unique necklace Feature: elastic stretchy Color: Black Material: Polyester fiber + alloy & thread 20 pcs Beading Cords Threads diameter:1.0 mm 100cm Beading Cords Threads: diameter:1.mm length:50.8cm extra extension chain:5cm Package Contents: 1 set x 20 pcs Beading Cords Threads 1 roll x 100cm Beading Cords Threads Only 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. 1 set 20 pcs Beading Cords Threads & 1 roll 100cm Beading Cords Threads STRONG AND STRETCHY:it consists totally 4 elastic cores, which makes it strongly elastic and durable for long time use. Thick and hard to break, sturdy enough to secure your bracelets / crafts EASY TO WORK WITH: The necklace string for kids is easy to cut and tie, flexible and relatively easy to knot while you are working with it. Don't need to make many knots to secure it WIDELY APPLICATIONS: Our elastic cording for bracelets are great choice for many uses, you can use it for beading (bracelets, necklaces, and other jewelry making projects), sewing (mask, hats, sleeve, skirt and other sewing projects) and holding (traveler notebook, hair bands and so on)