T80 adopts heat-insulating profiles, and the outer shell is designed to be streamlined. It is suitable for plastic steel, aluminum alloy, and surgical doors and windows. The inner material is processed into a mosquito net shape, and a dust-proof net can be added at the same time to prevent insects and dust. The inner net is easy to take out by hand. It is installed above the glass, easy to clean and maintain, and the movable leaf has four seals to make it have excellent waterproof and windproof performance