It are essential accessories for achieving fine particle size reduction in laboratory sample preparation. These grinding balls combine the chemical inertness of PTFE with the density and strength of a steel core, making them suitable for processing a variety of materials, including those sensitive to metal contamination. Their 10 mm diameter is ideal for homogenizing and pulverizing samples in Retsch's Mixer Mills, such as the MM 200 and MM 301 models. The pack contains an appropriate quantity of grinding balls, ensuring ample supply for multiple applications.