The best window for the window is made of galvanized metal and high -quality plastic. When choosing plastic windows for your housing, be sure to pay attention to the design of the profile. For this company, manufacturers offer their customers a graphic image of the profile in the context of which you can see all the nuances. The thicker the metal inside the window profile, the more reliable the structure is the optimal thickness of the metal sheet for reinforcing the profile is 1.5-1.7 mm. Biditrade is a bona fide company a manufacturer that does not save on the internal component of the windows, so the windows of this company are durable and reliable, they have good indicators for a number of quality criteria for plastic windows.