Each 96 deep well rack comes with 1.2 mL cluster-strip tube and cap assemblies. Each tube is pre-filled with 1.4 ceramic spheres, 0.1 mm silica spheres, and 1 (one) 4 mm glass bead. Lysing Matrix E is primarily used for environmental samples such as soil, sludge, wastwater 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.