Micromesh Polishing Belts are supplied in packages of ten belts of one grade. Each measures 1/4″ x 13″ and fits the Micromesh Polishing Tool (sold separately). Three grades are available; AO grade is meant for softer objects such as ceramics or plastic. The “MM” (or regular) grade is used for acrylics, plastics, bakelite, cultured marble, or wood. Particularly hard surfaces such as metals warrant the “MX” grade. A variety of belts is offered within each grade. We suggest using water as a lubricant where possible.