Nylon 66 Coated Beading Threads for Seed Beads, BlackSize: about 0.1mm in diameter, about 54.68 yards(50m)/roll.●Material: This jewelry string is made of Nylon 66, sturdy for use and beautiful looking. ●Nylon thread coated with a special finish to make it more durable and less likely to unravel. The coating can provide additional protection against wear and tear. ●Perfect for weaving with seed beads. The beading string cord is for bracelet, necklace, bead weaving and other jewelry craft projects. ●Learn simple and exciting techniques to make jewelry just like you see in department stores, affordable way for DIY to get great style.