3D Printing: Markforged Mark Two The Markforged Mark Two is a professional carbon fiber composite 3D printer using Continuous Fiber Reinforcement (CFR) to produce strong, reliable parts. Its hardened extrusion system allows printing Onyx — a micro carbon fiber–filled nylon filament that cannot be handled by traditional extrusion systems. Specifications: Markforged Mark Two Build Volume: 320 × 132 × 154 mm Layer Height: 100 μm Nozzle Temperature: 180–320 °C Filament Diameter: 1.75 mm Materials: Onyx, Nylon, Precise PLA Fibers: Carbon Fiber, Fiberglass, HSHT Fiberglass Spec