Each impact-resistant 2 mL tube contains garnet matrix and one 1/4 inch ceramic sphere. Extra 1/4 inch ceramic spheres are packaged separately. Lysing Matrix A tubes have orange caps and are found in the FastDNA™ and FastDNA™ SPIN Kits. Lysing Matrix A is used for all sample types except soil for the subsequent isolation of genomic DNA. This grinding matrix is chemically inert and will not bind nucleic acids.