Pack of fifty 2-ml tubes containing ceramic beads for sample homogenization. Use in combination with the MN Bead Tube Holder (Cat. # 740469) and NucleoSpin Soil (e.g., Cat. # 740780.50) or Nucleospin Stool (Cat. # 740472.50), miniprep kits for isolation of total DNA from soil, sediments, or stool samples.