Containing by weight more than 50% of alumina (Al2O3), of silica (SiO2) or of a mixture or compound of these products

Details

Parent HS6

690220 Refractory bricks, blocks, tiles and similar refractory ceramic constructional goods; containing by weight more than 50% of alumina (Al2o3), of silica (SiO2) or of a mixture or compound of these