MB-45 is a modern aluminum system intended for designing elements of architectural exterior and interior enclosures that do not require thermal insulation, e.g. various types of partition walls, windows, manual and automatic sliding doors, swing doors, vestibules, display windows, ticket box offices, showcases and spatial structures. The structural depth of the window sections is equal to 45 mm (frame), 54 mm (casement), and the door: 45 mm and 45 mm, respectively. Such assumed depths of the casement and frame sections give the effect of one surface from the exterior side after closing - in the case of the window, and the facing effect to the surface of casements and frames in the case of doors. Shape of the profiles allows achieving slender and resistant window and door structures.