Refractory bricks, blocks, tiles and similar refractory ceramic constructional goods containing, by weight, > 50% alumina, silica or a mixture or compound of these products (excl. containing, by weight, >= 93% silica, > 7% but < 45% alumina)
Opeka, bloki, ognjevarni, za vgraditev, nad 50% aluminijevega oksida (glinice), drugo