Kingda PTFE roller mill jar is precision-machined from virgin PTFE (polytetrafluoroethylene) material, offering unmatched chemical resistance and contamination-free grinding for corrosive and high-purity materials in laboratory jar mills and rolling ball mills. Key Features Virgin PTFE material with excellent acid, alkali and organic solvent resistance Non-stick smooth surface prevents material adhesion and cross-contamination Operating temperature range from -200C to +260C