You will be dazzled at how brilliantly reflective Sulky Sliver Metallic thread is when you incorporate it into your latest project. Sulky Sliver thread is a thin, flat, ribbon-like, foil that is laminated with polyester, which makes it brilliantly reflective so you can add the ultimate sparkle to all of your decorative projects. Sliver metallic thread works perfectly on sewing, serging, and knitting machines, and for handwork. It does not fuzz, fray or shrink. Made of nylon and polyester, 40wt and includes 250 yards. Use sewing machine needle size 90/14.