COMPOSITE SHEETS CONSISTING MOSTLY OF METALS, SUCH AS STEEL, STAINLESS STEEL, ALUMINUM, ALUMINUM ALLOYS, TITANIUM IN COMBINATION WITH PLASTIC MATERIALS, SOLD TO FABRICATORS FOR USE IN FABRICATING BUILDING MATERIALS SUCH AS GUTTERS, SOFFITS, PANELS, BUILDING BOARDS, ROOFING PANELS, ADVERTISEMENT BOARDS, BILL BOARDS, PANELS FOR THE INTERNAL AND EXTERNAL LINING OF BUILDINGS, PANELS FOR SUSPENDED CEILINGS, PANELS FOR THE LINING OF DOORS AND ELEVATORS, PARTITION WALL PANELS, PANELS FOR THE RAILING...