Special Coated Nylon Beading Threads for Seed Beads, PeruSize: about 0.1mm thick; about 50yards/roll.âMaterial: This jewelry string is made of nylon, sturdy for use and beautiful looking. âPerfect for weaving with seed beads. The beading string cord is for bracelet, necklace, bead weaving and other jewelry craft projects. âLearn simple and exciting techniques to make jewelry just like you see in department stores, affordable way for DIY to get great style.