Beadsmith Craft Wire is available in 3 new shapes: half-round, square, and twist. All tarnish resistant wire has a copper core with permanently plated color and a tarnish resistant baked-on nylon coating. The half-round and square wires are available in 6 different colors and the twist in 3 colors. These soft tempered Half-round, square, and twist craft wires are available in 18 or 21 gauge. Made in USA