1. Profile: the nominal wall thickness of the main force-bearing part is 1.4mm; 2. Hardware: multi-point anti-theft lock, German HOPPE handle, safe and anti-theft; 3. Standard configuration: German Noto stainless steel mushroom head lock body; 4. Track: stainless steel track, smooth sliding; 5. Glue injection: The frame fan adopts the corner glue injection technology, which is stable and reliable, and has a long service life; 6. Optional: double fan, four fan, flexible configuration, can be equipped with diamond mesh screen window.