Cots are metal or other materials as the core, covered with rubber vulcanized and made of roller products.

It can be divided into paper mill rubber roller, printing and dyeing rubber roller, printing rubber roller, hulling rice rubber roller, metallurgical rubber roller and oil printing rubber roller according to its USES.

The rubber roller is generally composed of outer rubber, hard rubber layer, metal core, roll neck and vent hole, and its processing includes sand blasting of the roller core, adhesive treatment, adhesive molding, wrapping cloth, wire winding, vulcanization and surface processing.Cots are mainly used in papermaking, printing and dyeing, printing, grain processing, metallurgy, plastic processing and other aspects.