21 gauge copper flat artistic wire. 3 feet. 3mm x .75mm. Artistic Wire goes flat! Use this versatile tarnish resistant flat copper wire to create spirals and twists, or bend it into all kinds of shapes to create dangles, drops, bracelets, rings, and more. Copper core wire 3.0mm x 0.75mm with tarnish resistant color coating is stronger than flat aluminum wire.