As the professional manufacturer, we would like to provide you high quality Fashion Unite 43mm Composite Wood Door. 43mm thickness compound wooden door leaf, frame is solid wood core board, 4.5mm MDF engineer veneer on both side, 38mm archway bridge dynamic board inner, the high rigidity of archway bridge dynamic board can expand the punching strength and no deformation (20kg/cm2). In our lab test, the archway bridge dynamic board without and deformed on 30min fire, the best performance board quality. Reach <DIN 410 standard> above 30min.