MakerBot METHOD Nylon 12 Carbon Fiber Filament. Made of carbon fiber reinforced nylon 12 material, this filament has 66 MPa tensile strength and 6000 MPa tensile modulus. This filament works with MakerBot METHOD and METHOD X 3D printers. It requires the Composite Extruder 1C. It can also be used with support compatibility, such as PVA water soluble and SR-30 dissolvable filaments.