Stiles/rails: hardwood or softwood(pine or fir) Panel: MDF + face veneer Face veneer: Sapele, ash,beech, maple, ... High-quality raw materials:hardwood, FIR core,tubularchipboard,honeycomb,laminated fir,MDF board with wood veneer surface. We can make ... .2)Door structure:Rails/Stiles: Finger joint hardwood or softwoodCore: laminated fir, chipboard, tubular chipboard, wood strip, honeycomb, hollow, etc ...