Worldwide Packing Material is a professional exporter for grey paperboardblack paperboard,EVA foamrope handles.,brWe can make the grey paperboard from 300 gsm to 3500gsm with various sizes in both sheets and reels which can be widely used for various package> gift box jigsaw, furniture arch file, book hardcover and other stationery etc.,brThe black paperboard is special used for making mosquito coils>the burning time is 6.5 8 hours~burn fullyenvironmental,economic.br