Prefilled 2.0ml tubes contain a mix of 0.1mm Silica, 1.4 mm diameter Zirconium & 4mm diameter Silica Beads. Useful for homogenization of soil, sludge, feces and environmental samples. Beads are acid washed and heat treated to remove contaminants and render them nuclease and protease free. Supplied in packs of 50 tubes. Tubes are suitable for use in most bead homogenizers including the BeadBug 3, BeadBug 6 and BeadBlaster 24.