Steel sheets Galvanized steel S220GD according to EN10346 standard with thickness between 0.5 and 1.0 mm and metallic coating upon request. Organic coating according to EN10169 standard. Other materials such as stainless steel, aluminum, etc. can be manufactured. Internal Insulating Core Formed by mineral wool (stonewool or glasswool) with different densities. Its own milling system guarantees the filling of the hollows of each profile. The classification of mineral wool for reaction to fire is A1-s1,d0.