... :4mm,5mm,8mm,9mm,10mm,12mm,15mm,18mm,20mm,25mm3)Glue:E1,E2,WBP,MR,Melamine4)Core:poplar,hardwood,birch,combi,eucalyptus,birch5 ... pallets . The bottom is strong pallets with one sheet of plywood as protected board , all the goods are wrapped by plastic ... bags .Four sides and top with one sheet of plywood .Then all the goods are strenghened by steel stips. poplar plywood sheet