… tiles and other articles of pressed or moulded glass, whether or not wired, of a kind used for building or … purposes; glass cubes and other glass smallwares, whether or not on a backing, for mosaics or similar …
Explanatory notes
… tiles and other articles of pressed or moulded glass, whether or not wired, of a kind used for building or … or archways, but are also used, usually in conjunction with concrete, for slabbing the lining walls of cellars, basements, underground corridors, etc. The heading thus includes solid or hollow bricks, …