milled fibers are specially processed PAN (polyacrylonitrile) based fibers for high-volume applications that require strength and/or electrostatic dissipation. PANEX® 30 high-purity milled fibers are 99+% pure carbon fibers derived from Zoltek’s high temperature graphitization process. Zoltek’s in-house milling system ensures product quality and traceability from raw material through finished product.