1. Quality HDF wood boards for door leaf and door frame, and the surface is coated by pvc film. 2. China Fir inside block structure for door body and filled with wood strips or honeycomb paper. 3. Frame: Composite frame made HDF & solid wood. 4.Packing: PE foam and strong chipboard carton(special package requirement acceptable to us) 5. The dimension comes for wall cave size(wall to wall). 40mm comes for door leaf thickness. Frame based on 10-14cm wall thickness.