... 3) Feature-Light,strong,non-toxic,Water Proof Our pp hollow board is good in quality and reasonable in price:DescriptionPP ... Hollow Board / PP Corrugated SheetMaterialPP (polypropylene)Width & length (mm)<1800, limitsLimitless ( ... us the follow details for your quotation:size of the sheet (thickness*length*width)GSM(gramper square meter )this is ...