Elastic String Cord: Comes with a roll of 20m/66ft clear elastic string with a diameter of 1mm. 1mm diameter of the cord fits for most bead sizes and 20m length is enough for bracelets and necklace jewelry making and the roll is lightweight and portable that you can take it to school or gathering and bead with friends. High Quality Stretch Thread: The bead thread is made of high quality polyester material, wear resistant for long time use. High elastic and stretchy, not easy to break that you dont need worry about the jewelry break and lose your favorite beads. Clear Stretch Bead Cord: Design with clear crystal color, beautiful and invisible that will not effect the beads color and pattern. Easy to knot which make the jewelry making easier. Easy to use: The crystal string is simple to across the bead and dont need other tools. Easy to tie a knot and hide the knot in the hole of the beads to make the knot invisible and make the jewelry more delicate. Widely Application : The elastic string is widely used to making bracelets, necklaces and other beading jewelry. It is also suitable for other hand make and craft.