Precellys Dry Hard Tissue Grinding Kit includes 25 preps of 6.8 mm ceramic beads (CK68) in 15 mL tubes. Custom design reinforced tubes for bead beating application: O'ring and reinforced materials for dry grinding, valuable or very hard samples. CK68 is designed for dry samples grinding like rice grains, pepper grains, and more. Sample size range from 400 mg to 4 g tissue or 400 µL to 9 mL culture. [Bertin Catalog P000950-LYSK0-A.0; Previously KT03961-1-514.15]