The stepped high and low track design, combined with large-sized drainage holes, can quickly drain accumulated water in rainy days and effectively prevent rainwater from flowing into indoor spaces. The window frame is made of aluminum alloy profiles, combined with precision hydraulic punching technology, the components are tightly fitted, and the overall frame is firm and not easy to loosen. Equipped with a bidirectional curved crescent lock, the opening and closing operation is smooth and effortless, the locking is stable and reliable, and the window sash can be easily locked indoors. Using scratch resistant glass, the surface is not easily scratched and has excellent resistance to external impact, maintaining a clear view even after long-term use. Can be paired with high transparency hard mesh, providing a clear and open view. The corners are equipped with protective rubber covers to reduce collision damage during transportation and installation., Manufacturer: AY8ADYUI