This profile system is a basic profile HOLZ 78 + aluminum set on the outside. In this system, the outer side of the window is fully protected from the harmful and aggressive external influences. The window of the profile system ALU 90 should be used in an urban environment, where the air has a lot of sand and dust acting as abrasives erasing outside the window. Also, the window of ALU 90 is often used in cases where the external color of the windows of the building is strictly regulated in order to avoid double-sided painting. The total installation depth of the profile is 87 mm. From the premises it has the classic look of a wooden window with molding. The external side of it is covered with a smooth aluminum set, painted in any color by RAL table; the ability to install hidden fittings and child protection.