16 Ga Square Copper Wire (Dead Soft) choose Length, 99.9% Pure Copper | eBay
Buy Artisan Copper Wire, Square, 21ga, (21ft) at Vintaj
Buy Artisan Copper Wire, Square, 18ga, (21ft) at Vintaj
Square Copper Wire Square Metal Wire Width 1.02mm 0.7mm Gold Silver Color Hand-made Diy Material Metal Winding Molding Line - Electrical Wires - AliExpress