664: Glass

6641: Glass in the mass, in balls, rods/tubes; waste glass 6642: Optical glass and elements of optical glass 6643: Drawn or blown glass, unworked, in rectangles 6644: Cast, rolled, drawn or blown glass, in rectangles 6645: Cast or rolled glass, unworked, whether figured/not 6646: Bricks, tiles, slabs & oth.art.of pressed/moul.glass 6647: Safety glass consisting of toughened/laminat.glass 6648: Glass mirrors (including rear-view mir.) , unframed, framed 6649: Glass, ne.es. 664: Glass