Currently, society, more than ever, attaches great importance to the choice of safe, healthy and environmentally friendly products. So, when choosing metal -plastic windows, you should also be interested in what materials they are made. It is very important that such windows do not emit harmful substances during operation. If we are not able to fight a harmful lead on the streets, then at least in our house we should think about our health. Nowadays, metal -plastic windows of individual foreign firms have become known in the market due to high quality, as well as an environmental concept. Such windows have gained recognition in absolutely all European countries. During their manufacture, environmental norms of the European Union are observed, they have excellent consumer properties. All this is possible thanks to new technologies for the manufacture of PVC windows using calcium-tohy stabilizers (safe both for humans and environmental. This, in turn, made it possible to abandon such harmful and toxic materials, such as lead and cadmium.