MB-SLIMLINE is a window system with thermal barrier that provides high thermal insulation. The system was designed for various types of windows with interior opening (side swing, horizontal swing, oscilo-swing) or fixed with high performance thermal and acoustic performance, water and air proofing and high structural strength.

Thin aluminium profiles of the MB-SLIMLINE allows building two types of windows with visible (SG) profiles or invisible from the outside. Using hidden sill makes both opening and fixed windows look almost the same. This system can replace old windows with steel profiles retaining the building's outward look but with much improved thermal performance.