Silkon® is a special heat-set nylon. Because of its exceptional durability and resistance to fraying, it can be used with abrasive stone or metal beads. Use lightweight thread for designs using small gem beads & freshwater pearls. Use medium-weight thread for plastic, glass and wood beads. Use heavyweight thread for gemstone, metal and larger glass beads. Color may vary from dye lot to dye lot.
Thread>Nylon>BlacksStringing Material>ThreadNylonBlacksSilkon#1https://www.firemountaingems.com/itemdetails/h201054bsH201054BSThread, Silkon®, bonded nylon, lightweight #1, black. Sold per 20-yard spool.//image1.fmgstatic.com/images/p1054bsb.jpg3.033.03As Low As $0.07 per yard