Package Include-- You will receive 19 rolls polyester cord, the size of these cord is about 0.5mm in diameter, the length of each roll is about 37-40 yards. 19 Colors Available-- Including white, black, yellow, red and other beautiful bright colors, will meet most of your crafts project needs and add beautiful accents in your work. About Polyster String-- It is very strong and durable (better than cotton), has good heat resistance and thermal stability, is wrinkle-resistant and abrasion-resistant. Wide Application-- Great for friendship bracelets, shamballa style jewelry making, perfect as a necklace, waist chain, anklet, knot art, hand woven, buddhist bead, hanging decoration. With Spool-- All threads will come with plastic spools, never tangled or any mess, more easy and convenient to use for your regular project, they won't being fluffed and branched.