English voiceover, no subtitles. Functional prototypes with Nylon 12 Carbon Fiber. Thule uses a carbon-filled nylon FDM material to build test prototypes strong enough to simulate the finished parts, made out of injection molded glass-filled materials. Thule’s in-house prototypes using this nylon material have saved it enough time and money to almost achieve ROI on two 3D printers within two years of purchase. Learn more: