Simply Silk Beading Thread Cord Size F Black 0.0137 0.3480mm Spool 140 Yards for Stringing Weaving Knotting Silk Thread 3 ply for beading weaving and knoting 100% silk threads are considered essential for stringing fine gemstone beads and pearls. Thread is comparative to other renowned silk threads for jewelry-making The quality of Purely Silk??????? thread is comparative to other renowned silk threads for jewelry-making