Fiberglass CFF™ (Continuous Filament Fabrication) Spools. Markforged Fiberglass is a continuous fiber designed to reinforce Onyx or Tough Nylon. Parts containing fiberglass give you 5 times the strength of Onyx parts. Use for a wide variety of strong, robust parts.

What is fiberglass?
Extremely thin strands of glass bundled together into a fiber. Fiberglass is traditionally used in composites for boat, automobile, and aircraft manufacture.

How strong is fiberglass?
Fiberglass has a flexural strength of 210 MPa (30.5 ksi) and a tensile strength of 590 MPa (85.5 ksi).

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