It are essential accessories for achieving fine particle size reduction in laboratory sample preparation. Each ball features a robust steel core encased in high-quality PTFE, combining the strength of steel with the chemical resistance of PTFE. Their 12 mm diameter is ideal for homogenizing and pulverizing samples in various ball mills, including Retsch's Mixer Mill MM 200, MM 400, and CryoMill. These grinding balls are particularly suitable for applications requiring minimal sample contamination and are effective for processing soft, elastic, and fibrous materials.