Material : steel wire Size: Approx.0.38mm dia,35m each roll Feature:1.Tigertail (Tiger Tail) Bead Stringing Wire is nylon coated stainless steel wire that combines the softness of thread with the strength of steel Tigertail is easy to work with (no needle necessary), super-strong and renders secure jewelry that lasts! Use Tigertail for most general beading designs. 2.Perfect for jewellery making, sun catchers, scrapbooking or any arts and craft project. 3.Great for personal use, gift, market stall holder or reseller