Particle mesh size is the number of holes in a 1"-square screen. As the mesh number gets larger, the number of holes per inch increases, the size of each individual hole decreases, and the media becomes finer. Grit refers to coarseness; the lower the number, the coarser the grit.

Black Beauty Grit—Also known as black diamond and black blast, it's the best alternative to silica sand. Contains less than 0.1% free silica. It's inert and moisture free. Not recommended for removing paint from aluminum and plastic.