6810.11.00

Articles of cement, of concrete or of artificial stone, whether or not reinforced: Tiles, flagstones, bricks and similar articles: Building blocks and bricks Containing by weight more than 70 percent magnesia, expressed as MgO, with carbon content ranging from trace amounts to less than 30 percent, and chemically bonded by resin or pitch

Articles of cement, of concrete or of artificial stone, whether or not reinforced: Tiles, flagstones, bricks and similar articles: Building blocks and bricks Other