1 6815 91 00 10 Chemically bonded, unfired magnesia bricks, whose magnesia component contains at least 80% MgO, containing magnesite
2 6815 99 10 20 Chemically bonded, unfired magnesia bricks, whose magnesia component contains at least 80% MgO
3 6815 99 90 20 Chemically bonded, unfired magnesia bricks, whose magnesia component contains at least 80% MgO
4 6901 00 00 00 Bricks, blocks, tiles and other ceramic goods of siliceous fossil meals (for example, kieselguhr, tripolite or diatomite) or of similar siliceous earths
5 6904 10 00 00 Building bricks
