[Steel fire doors factory direct, can be customized. Composite steel fire doors are the main flap and the auxiliary flap disposable repression, smooth surface, no welding, strength and other characteristics. Middle filled with ceramic fiber blanket, has good fire-retardant insulation effect, greatly reducing the unexposed surface of the heat radiation, superior performance products according to GB14102-2005 "fire shutter" inspection, the product performance and quality are up to the national test standards. Bao Gui Door Industry Jinan customers are welcome to order. Wang: 18615193068 Website http://jnbgjlm.xuanchuanyi.com