The Benchmark Scientific D1032-05 Prefilled 2.0mL Tubes contain an appropriate amount of 0.5mm diameter zirconium (ceramic) beads for bead homogenization. The tubes are ready to use: beads are acid washed and heat treated and certified to be nuclease and protease free. Tubes are filled in a process tested by qPCR to be free of stray DNA. Suitable for homogenization of bacteria, fungi, spores, molds and small yeasts. The tubes are suitable for use in most bead homogenizers including the BeadBug 3, BeadBug 6 and BeadBlaster 24.