The indoor fireproof door is generally made of wood, which is no different from the ordinary indoor door in appearance, with various and beautiful styles, and will not damage the original family decoration style. The inner core of the indoor wooden fire door is filled with layers of flame retardant materials treated by special process, and the fire rating can reach the national fire protection grade A (fire retardant 1.5 hours) and B (fire retardant 1 hour).