CarbonX PC+CF CarbonX PC+CF is a high-performance carbon fiber reinforced polycarbonate filament. This material is ideal for anyone that desires a structural component with high heat, high stiffness, excellent surface quality, and dimensional stability. Polycarbonate has a Tg of 147C and offers some of the highest thermal performance on the 3D printing market. MADE IN THE USA We manufacture all of our filaments in our 68,000 ft² manufacturing facility (located in Grand Rapids, Michigan) using state-of-the-art equipment and processes. Our goal continues to be to make the most innovative filaments on the market – targeting difficult end-use applications.