30m spool. For beads that have sharp-edged holes which could cut thread. This beading wire is a miniature braided stainless steel cable covered with nylon. It is also excellent with heavier necklaces or designs which require a stiffer 'lie' than thread. Beading wire should be terminated with crimp beads, and no beading needle is required. This .012 diameter wire is suggested for light to medium weight strands