Rubber, gutta-percha, gum, mica and goods made from these materials and not included in other classes; plastics in extruded form for use in manufacture; packing, stopping and insulating materials, including glass wool, rock wool, expanded polystyrene, extruded polystyrene and products made of these materials for insulating purpose (including in this class); flexible pipes, not of metal; pipe muffs (not of metal); adhesive bands and tapes (other than stationery and not for medical or household purposes)