Gorgeous windows and doors, steel doors and windows development, Tangshan steel doors and windows provided by Ramada. We are Shijiazhuang Sino-American Door (www.sjzygf.com) located at: Shijiazhuang specializes in: Shijiazhuang sun room, bridge aluminum doors and windows, shower room, glass partitions, although it has been learned that steel doors and insulation, sound insulation, anti-aging, etc. are superior to other materials windows and doors, but the same as the steel doors and steel doors and windows, their performance and price is also very different kind of steel doors and good, cheap plastic doors and windows around 100 yuan per square meter, which brand is good, but expensive then a thousand dollars, in the end is what causes such a big price difference? professionals visited this purpose, hoping to provide a way for readers to buy, so you aware of when buying steel doors. Shijiazhuang gorgeous doors steel doors and steel doors and acceptance of welding depends on whether its welds flush, cracks, corners and outside seam cleanup too is clean and beautiful, with a box-foot diagonal measurement of steel doors and windows, its diagonal size difference should not be greater than 3mm, the smaller the difference diagonal display technology more sophisticated, but also conducive to the installation. Hardware Hardware The quality of Shijiazhuang gorgeous doors steel doors and steel doors and acceptance of life on the doors and windows have a certain influence the development of plastic doors and windows, hardware used should look seemed thick and better surface gloss, protective layer of dense, do not touch the scratch phenomenon, the most important thing is to be open and flexible.