... . Doors structure:Engineered solid wooden door: fir wood core, natural hardwood surrounded in the lipping, ... tongue and groove glued together under high pressure, veneered with natural hardwood2. Doors finish painting ... or oil stain, can be matt or polish 3. Wood species: ash, sapeli, chempaka, Chinese cherry, black ... 4. Dimension and design can be customized. High Quality Wood interior Door