Window reinforcing profile is a reinforcing element inside the PVC profile, which imparts stiffness and maintains the desired predetermined shape of the window or door design. The reinforcing profile is a special metal structure inside the plastic frame, it can be of different shapes and sizes, depending on the size of the frame of a particular product. This product is made of galvanized steel. That is why Windows are often called plastic. Its main function is to give additional rigidity to the plastic window, as the plastic has a low form of elasticity. That is, this product makes the design more stable, especially in regions with a large temperature spread (these include most regions of Russia). You can see the range of reinforcing profiles and their description in our photo catalog.