Soil grinding SK38 - Mix of glass and Zirconium oxide beads - 2mL pre filled tubes ; Lysing kit for Precellys - SK38 Soil Kit - 2mL tubes 50 Prep. The SK38 kit is composed of a complex matrix containing 0.1mm glass beads, 1.4mm ceramic (zirconium oxide) beads and a 3mm glass bead. This kit is specially indicated for the extraction of DNA/RNA/Protein from micro-organisms such as bacteria, parasites, yeasts contained in a complex sample like soils, sediments, feces etc. from 20mg to 200mg. Compatible with MP Fastprep, Omni Bead Ruptor BR24