Xiamen Chuangxin wrought iron doors are made of premium quality materials: Q235 steels which are more secure. Hongtu wrought iron doors have 50mm think door panels and 2.5mm-3mm frames providing stronger, safer doors. The wrought iron doors are sprayed zinc and painted with acrylic for weather resistant at least for 10 years. The threshold are apart of our 4-sided frame providing extra protection from water infiltration. They are galvanized, hammered and welded. There are weather stripping seals installed on all sides of the doors for water tight. All of Hongtu wrought iron doors are hand-forged by well trained and experienced craftsmen. The doors are injected with polyurethane foam. The foam expands to fill all of the air space inside of the doors. Hongtu wrought iron doors have two layers. The heavy iron work is on the outside and the second layer is safe tempered glasses (clear glasses, rained glasses, frosted glasses and so on which can be open independently from iron work in order to clean both sides of glass panel and secure. All styles and specifications are available. Qualified and better price Hongtu wrought iron doors will satisfy you.