●The nominal wall thickness of the main force-bearing part is 2.0mm; ●Standard configuration Ximek special folding door hardware; ●Internal/external folding is optional, which can meet the installation of large openings, realize large passage area, and design freely; ●24mm wide European standard cavity insulation strip design; ●Optional built-in manual shutter glass; ●The lap joint design of all rubber strips ensures the sealing performance; ●Flexible sealing between fans to prevent hands from being caught; ● 3° inclined design gravity drainage, unobstructed; ●The central slide rail, double-row pulleys, top guide pulleys, smooth opening and closing operations.