PAVING BLOCKS, SLABS, BRICKS, SQUARES, TILES AND OTHER ARTICLES OF PRESSED OR MOULDED GLASS, WHETHER OR NOT WIRED, OF A KIND USED FOR BUILDING OR CONSTRUCTION PURPOSES; GLASS CUBES AND OTHER GLASS SMALL WARES, WHETHER OR NOT ON A BACKING, FOR MOSAICS OR SIMILAR DECORATIVE PURPOSES; LEADED LIGHTS AND THE LIKE; MULTI-CELLULAR OR FOAM GLASS IN BLOCKS, PANELS, PLATES, SHELLS OR SIMILAR FORMS