Printer filament is the plastic strand fed into a 3D printer as its raw input material. Common types include PLA, ABS, and PETG, each with different strength, heat, and flexibility properties. In practice, filament quality matters as much as the printer itself: diameter consistency, moisture, contamination, and material composition all affect whether a print succeeds.
In cyber security, filament becomes relevant whenever 3D printing is part of a trusted workflow, such as rapid prototyping, device enclosures, jigs, or replacement parts. Attackers can abuse weak supply chains by substituting poor-quality or mixed filament, causing prints to fail or produce parts that look correct but perform badly. Defenders reduce this risk by controlling material provenance, storing filament properly, validating print settings, and inspecting finished parts for defects or tampering.