Interior door (MDF/PVC) usage :interior or outside function:no painting 1, ... radiant pollution formaldehyde, toluene, bad chemicals and so on6, PVC covered ob the surface and paint free7, Moisture proofing, ... hinge, screws, rubber seals, installation bolt9, Door leaf: Solid wood skeleton inside, MDF board for both side, solid timber inlay10, Advanced ... : 220 sets for 20GP, 460 sets for 40GP door