Each impact-resistant 15 ml tube contains 1.4 ceramic spheres, 0.1 mm silica spheres, and 8 (eight) 4 mm glass beads. Lysing matrix E is primarily used for environmental samples such as soil, sludge, wastewater and feces. Lysing matrix E can also be effective in lysing mixed samples, such as microbe infected tissue, and can be used in RNA Extraction from tumors and other difficult tissues.