interior solid wood knotty pine door, panel door, stable structure, suitable moisture content, high quality. Solid wood door*Specification:1) Optional Wood: Oak, Hemlock, Pine, Alder, Mahogany, Ash, Okoume ... of solid wood laminatedPanel: solid wood B) if what you need is engineering composite wood door, structure is like belowStile&rail: finger-joint wood + MDF + solid veneerPanel: MDF + wood ...