The AL39000HS system is an opening hidden panel system, the most important feature, out of competition, using frame facing just 57mm. This frame is identical to the AL42000 resulting in a perfect harmony even when the two systems coexist.
Topswing is a new generation of window fittings for all types of fully reversible windows. Window fittings is important for the window structure and function. The innovative design of topswing with sliding rear at the back, interlocking security pins and an integrated opening limiter in the seizure, gives the window high security and very good function. Topswing suits both wooden windows, aluminum windows, wood / aluminum windows as well as pvc window.