Non-slip mats are made of durable, flexible plastic with an extreme coefficient of friction against other dry materials. Mats measure 9-3/4″ x 5″ are only 2mm thick. They are designed to prevent objects from sliding or rolling caused by extraneous forces. These mats are ideal for holding laboratory glassware in place to prevent spills or to hold ceramics or other artifacts steady during treatment. The mats do not migrate plasticizers, and when soiled they may be cleaned with hot, sudsy water.