1. Profile: the nominal wall thickness of the main force-bearing part is 1.5mm; 2. Hardware: suitable for imported European standard C-slot hardware; 3. Heat insulation strip: frame 33mm, fan 24mm wide European standard heat insulation strip design; 4. Adhesive strip: Three-layer sealing strip design, excellent sealing performance; 5. Group angle: high-strength cast aluminum corner code plus two-component glue injection, cast aluminum to strengthen the flat sheet.