Neuwall GlassWall is the innovative model of operable glass wall systems offering excellent sound control with sound ratings up to 46 STC. This system combines Heavy-duty steel-gusseted aluminum inner frames reinforced with full height with a two inch insulated glass unit to achieve optimal acoustic performance while allowing natural light to enter the interior spaces. For more details: https://www.neuwall.com/movable-glass-wall/movable-glass-wall-frame.html