MCr 80, M 85, M90, HA 55. MCr 80, M 85, M90, HA 55. Bauxite-spinnel castable LCC. Bauxite-spinnel castable LCC. MCr 80, M 85, M90, HA 55. MCr 80, M 85, M90, HA 55. Bauxite-corundum castable MCC. Bauxite-corundum castable MCC. Descriptions according to Classification of Refractory Materials under the Unified European Norms (PN-EN)