Amazon.com: Reprapper Triple Color Filament Coextrusion PLA Filament 1.75mm for 3D Printer & 3D Pen, Multicolor Like Dual Color Rainbow PLA, 2.2lbs (1kg), Silk PLA Gold / Copper / Black : Industrial
Germany Leipziger LEV 1 kg kilo 1000 g grams .9999 Fine Copper Cast Bar | eBay
Amazon.com: Reprapper Triple Color Filament Coextrusion PLA Filament 1.75mm for 3D Printer & 3D Pen, Multicolor Like Dual Color Rainbow PLA, 2.2lbs (1kg), Silk PLA Gold / Copper / Black : Industrial