Simply Silk Beading Thread Size D Black 0.012 Inch 0.34mm Spool 260 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