Shijiazhuang Ramada Door (www.sjzygf.com) located in the 6th Yuejin Road, Shijiazhuang, Hebei Shijiazhuang Area C mine machines, Contact: Liuling Bo steel doors Disadvantages: 1: PVC material steel is bad, it must be within the additional steel bars to increase the hardness. Plastic shortcomings. 2: Fire performance slightly worse, if the requirements under fire conditions are relatively high, recommend using aluminum materials. Plastic shortcomings. 3: Plastic material brittle steel doors wholesale definite, definite heavier compared to aluminum to steel doors offer, will toxic emissions when burned. Steel doors and aluminum windows and doors in terms of quality and price are some differences compared to steel doors and aluminum doors: First drawn on a steel door with a small metal definite steel doors, more conservation of resources; secondly, sealing steel doors to better than aluminum door; again, steel doors during use, resulting in a small mechanical noise than aluminum doors. Rather than on the hardness of the aluminum door door steel doors steel doors and windows made of high positive definite, more durable, but a long time, easily deformed, while its price is relatively higher in terms of some steel windows.