1. High waterproof performance: Aluminum alloy casement window using high-quality sealing materials, so that it has a good waterproof effect, can effectively prevent rain infiltration. 2. Heat insulation and sound insulation: Aluminum casement window is composed of a variety of materials, which can isolate the temperature difference between indoor and outdoor, ensure that the indoor temperature is appropriate, and can also be soundproofed to reduce indoor noise. 3. Beautiful appearance: Aluminum alloy material can be designed into various shapes, very flexible, beautiful appearance, can increase the overall beauty of the building. 4. Low maintenance cost: Aluminum alloy casement window has high corrosion resistance, low maintenance cost and long life. 5. Safe and reliable: Aluminum alloy casement window adopts thicker tempered glass, which can resist impact and has high safety. 6.Parameter : U-Factor  ≤ 0.3 , SHGC ≤ 0.23 , Sound Insulation ≤ 36 db , Water Tightness ≥ 450 pa , Wind Resistance ≥ 4500 pa , Air Tightness ≤ 0.4 m3(㎡.h)