Sterling silver soft wire, priced by the meter. Hard wire is also available as a separate catalog item. Several widths available: 0.3mm (28 gauge), 0.4mm (26 gauge), 0.5mm (24 gauge), 0.6mm (about 23 gauge), 0.7mm (21 gauge), 0.8mm (20 gauge), 0.9mm (19 gauge), 1.0mm (18 gauge), and 1.2mm (about 17 gauge).