double click system: The bottom layer is made of birch plywood,and the surface,is made of boards of rare trees from Chinese northeast Changbaishan.Such as oak,ash,birch,maple,walnut,elm,and so on. The thickness of bottom layer is from 5mm to 11mm.Including 3-11 layers. the surface,from 0.6mm to 4mm. Using phenolic aldehyde adhensive(E0,E1). Common spec: surface board:oak Spec:14.2*127*400mm up 14.2*86*400 mm up The thickness of surface layer is 4mm,The thickness of bottom layer is 10.2mm. Price:FOB DALIAN(CHINA) USD18.00/M2 Moreover,we can manufature any pattern as customer requests. connect with:zhang xiaojiang mobile phone:13500996487 tel: 04326888002 fax:04326888002 or 0432688805 Web:http://djmy.en.ec21.com