https://www.matterhackers.com/store/l/nylonx-carbon-fiber-nylon-filament-1.75mm/sk/MD5LDGS7
NylonX is an engineering grade nylon filament which is blended with chopped carbon fibers (approximately 20% by weight), creating a high-strength filament...
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https://www.matterhackers.com/store/c/pro-series-filament/NylonX?ref=mh-landing
NylonX is an engineering grade filament, ready for home 3D printing, which gives you the durability of Nylon combined with the stiffness of carbon fiber.
nylonxmatterhackers