a) Grade: AA b) Material:Camphor pine, c) Two sides sanding with smooth surface and in high strength.The board can avoid wood bending well. d) Moisture content: 8%-12% e) There are no chromatism, knot, oleoresin, scar, split, moldering, wormhole, damage, blue stain, or wave in the surface. If you have any interesting,pls contact us at any time