Custom folding french door: 1.Watertightness and air-tightness 2.Fireproof 3.Impact ... window is one of our core products. Item nameCustom folding french door Product Description1) Model size & shape & design: As your requirements ... 2) Surface treatment: spray-paint, Silk Screen, Power Coating, Polish &Brush, Sand –blast, zinc/nickel/chrome plating, hot-galvanization, anodizing, etc ...