Face/Back: Poplar, Birch, Okoume, Sapele, Bingtangor. Core: Popler. Hardwood, Combi. Glue: E0, E1, E2, MR, Melamine, WBP. ... Face/Back: Poplar, Birch, Okoume, Sapele, Bingtangor.Core: Poplar, Hardwood, Combi.Glue: E0,E1, E2, MR, Melamine, WBP ... four sides, the top and bottom is with plywood packing.2, with 3mm plywood packing on four side, the top and ...