Clear your 3D printer’s extruder with these cleaning filaments. The compound in the filaments bonds to leftover material, flushing it out as the compound passes through. Run a filament through your extruder before switching to a new printing job to remove old materials or colors that could bleed over or jam the printer. Even if you’re not changing jobs, use these filaments to periodically purge residue from your system to keep it printing smoothly. At 8" long, each filament is sized for a single use, so there’s no need to cut them to size.