Fiber Reinforced materials can add great strength to your prints. It's important to use the correct nozzle for your printer when printing with abrasive filaments. Depending on the model of your machine, a hardened steel nozzle may be recommended, or for the UltiMaker printers either a CC Print Core (S-Series) or a HT Print Core (Factor 4 only). Individual filament listings will include the nozzle type requirements/restrictions.