19 NON METALLIC BUILDING MATERIALS, NAMELY, SIDING; NON METALLIC RIGID PIPES OTHER THAN FOR THE CARRIAGE OF LIQUIDS; NON METAL ARTIFICIAL LUMBER FOR BUILDING AND FOR CARPENTRY; NON METAL PANELS FOR WALLS, FLOORS AND CEILINGS; BOARDS OF CELLULOSE MATERIALS FOR BUILDING PURPOSES, NAMELY, COMPOSITE BOARDS FOR WALL PANELING; BOARDS OF NON METALLIC FIBROUS MATERIALS, NAMELY, COMPOSITE BOARDS FOR WALL PANELING; PANELS OF NON METALLIC MATERIALS FOR USE IN BUILDING WALLS, CEILINGS AND FLOORS; NON METALLIC DOORS, DOOR FRAMES, AND DOOR FITTINGS, NAMELY, DOOR HANDLES, DOOR ROSES, DOOR PLATES, DOOR PULLS, DOOR STOPPERS, DOOR PROTECTORS, DOOR KNOBS, DOOR BUFFERS, AND DOOR CLOSETS; NON METALLIC FLOORING PANELS; AND HARDBOARD PANELS FOR WALLS, CEILINGS AND FLOORS