Sterling Silver Extreme Soft Flex Beading Wire is made of sterling silver over steel with a premium, nylon coating. The 19-strand wire is as strong as 21-strand or 49-strand wire. Bright and attractive, Extreme Soft Flex will not tarnish. The beautiful finish matches sterling silver findings and beads perfectly, so it’s ideal for use in floating-bead designs that expose the wire. Sterling Silver Extreme Soft Flex Beading Wire is available in the following diameters: .014, .019 and .024. You must use crimp beads to securely fasten Soft Flex to a clasp.