Alu Alu Steel look (Alu-SL) The Alu–SL series gives you the thermal performance of aluminum windows with the aesthetics of steel windows. The beveled edges offer sightlines not seen in flat aluminum profiles. This system can be offered in large sizes with triple pane glass. Get A Free Consultation Techincal Details 01 Window Depth Depth Of Frame 110mm (4.33”) 01 Glazing Range Glazing Depth 55mm (2.1”) 03 Max number of panes Up to 3 Pane Glass Packs Available Available In Tilt and turn Fixed Balcony Doors Download Specs