Soft Flex Extreme Wire is a beading wire, free of heavy metals, for designers who want to add sparkle and shine to a piece that exposes the wire. The Extreme Wire will not tarnish and is great for free floating necklaces and pendants. The wire is constructed of 1x19 micro woven metal alloy wires, and is supple enough to be knotted. Soft Flex recommends Extreme Wire for designers that want to be 'green' and desire a high quality wire for high end jewelry. Soft Flex Extreme Wire is the world's first eco-friendly beading wire. Recycle us! All stainless steel used in the construction of Soft Flex products is 100% recyclable. Our nylon coating is derived from renewable resources and can be recycled. Our spools and clips can also be recycled - just tear off the label and put the empty spool into your recycling bin or mail them to: Soft Flex Company P.O. Box 80 Sonoma, CA 95476.