These are mainly plate-type mainly with dimensions of 10 x 10 mm to 150 x 150 mm and a thickness ranging from 4 to 30 mm, which are used as lining for areas with high stress from abrasive materials (transport of crushed coal, milled ceramic materials, etc.) The plates are glued to the base (usually steel sheets). The products are made of alumina ceramics, usually with 92% Al2O3 content, and their quality and properties are fully comparable to those of similar products from renowned foreign manufacturers.