The product of Space System Windows is very strong against wind with an aluminum frame structure. Even when exposed to the outside for a long time, there is no sagging of the window frame or separation between the window and the window frame due to contraction and expansion, which is common in general PVC windows. It is essential for high-rise apartments or coastal houses that are affected by the wind. Rainwater does not seep into the interior through the window, and condensation water is easily discharged. The ball frame integrated structure to prevent rainwater from overflowing, the specially designed water cap with a triple blocking method, and the triple gasket made of rubber and urethane have excellent sealing power and prevent rainwater from flowing into the interior due to osmotic pressure even in heavy rain and wind. If the watertightness is low, during the rainy season when heavy rain pours down, rain may penetrate between the windows, causing mold.