When you purchase this product please be aware that only 1 side of the plywood Is oak veneered on 6mm,9mm,12mm, however 2 sides are oak veneered on the 18mm plywood. The plywood is made up of American oak veneer, with a Chinese popular hardwood core. Our oak faced (Class 2) plywood offers both durability and aesthetic appeal. Each sheet is carefully constructed using layers of premium wood veneer bonded together with strong adhesive, ensuring structural integrity and longevity for your projects. Whether you're a professional woodworker, a DIY enthusiast, or an interior designer, our oak faced plywood is the perfect choice for a wide range of applications. From stunning furniture pieces to elegant cabinetry and decorative accents, the natural beauty and warmth of American oak will enhance any space. although this item is supplied unfinished, it can be waxed, coated, or coated. like a piece of solid oak, it can also be stained to darken it. not only does the robust and stable Chinese plywood core keep it flat, but it also accepts repairs well and can be edged to conceal the core. What is Class 2 grading? Class 2. For humid conditions - protected external applications and damp internal uses (and must have limited exposure to moisture during construction). (Other sheet material supplies available)