Rockin Beads Memory Beading Wire Spring Steel, 2-1/4" 0.55-0.60mm Thick. 200 loops approx Memory 55-60mm Dia Approx 200 loops Memory Beading Wire for Bracelet slide on beads then bend tip of wire to lock beads on wire Rockin Beads (TM) Brand comes with Rockin Beads Size Gauge Card