Carbon Fiber FR is a flame-retardant variant of Markforged’s unique, ultra-high-strength
Continuous Carbon Fiber. Carbon Fiber FR is only available as the aerospace-ready “-A”
version which comes with lot-level material traceability documentation and passes the test suite necessary for qualification under 14 CFR 25.853 for most 3D-printable parts.
Carbon Fiber FR-A is only compatible with Onyx FR-A and the X7 printer.