Kit includes 50 preps of 2.8 mm stainless steel beads in 2 mL standard tubes. MK28 is designed for hard tissue grinding like muscle, skin, spincor, bone, teeth, hair, seeds, corn, rice, and more. Sample size range from 20 mg to 200 mg tissue or 200 µL to 1.6 mL culture. [Bertin Catalog P000910-LYSK0-A.0; Previously KT03961-1-001.2]