Amazon.com: Carbon Fiber Filled Nylon Filament 1.75mm, UltraPA-CF 3D Printer Filament, 1kg Spool 3D Printing Filament for 3D Printers, Carbon Black : Industrial & Scientific
Amazon.com: iSANMATE 3D Printer Filament, Colorful Carbon Fiber Filament Bundle, PLA Filament 1.75mm Carbon Fiber Pla(Blue, Army Green, Coffee, Brown), High-Accuracy +/- 0.02 mm, 250g x 4 Spool : Industrial & Scientific