Hard tissue grinding MK28-R 2.8mm metal beads - 2mL pre filled Reinforced tubes ; Reinforced Lysing kit for Precellys - MK28-R Hard tissue kit - 2mL tubes 50 prep. The MK28 matrix is composed of 2.8mm Metal beads recommended for hard tissues such as muscle, skin, spinal cord, bone, teeth, hair but also for plant roots, rods or seeds like corn, rice, wheat etc. It ensures optimal extraction yields of DNA/RNA/Protein for samples from 20mg to 200mg of tissue. Compatible with MP Fastprep, Omni Bead Ruptor BR24.