Five different bead types allow processing of different samples in your Omni Bead Ruptor 12 homogenizer, 04728-01 (sold separately). Ceramic beads are ideal for soft animal, plant or human tissues. Metal beads are ideal for hard tissue types. Glass beads are ideal for processing microorganisms. Garnet beads are ideal for soil. Carbide beads are ideal for microbial and soil RNA processing.