Each impact-resistant tube contains 1.4 mm ceramic spheres. CeraLysis is used primarily for lysis of softer tissues like brain, liver, kidney, lung, and spleen. Also used to lyse plant tissue such a leaves, roots, and fruits, as well as cultured cells and whole insects. This grinding matrix is chemically inert and will not bind nucleic acids. Compatible with MP Biomedicals Lysing Matrix D, 50 x 4.5 ml tubes.