A look at the materials, aluminum profiles used for high-quality aluminum alloy skid plates, thickness, strength and oxide film, etc., should comply with the relevant national standards, the wall thickness should be above 1.2 mm, and the tensile strength reaches 157 Newtons per square meter. The yield strength should be 108 Newtons per square millimeter and the thickness of the oxide film should be 10 microns. If the above standards are not met, it is inferior aluminum alloy doors and windows, which cannot be used. Second, the processing, high-quality aluminum alloy skid plate, fine processing, installation, stress, good sealing performance, switch freely. Inferior aluminum alloy doors and windows, blindly selected aluminum profiles and specifications, processing rough and shoddy, sawing instead of milling, not installed according to requirements, poor sealing performance, switch is not free, not only leaking wind and rain and glass burst phenomenon, but also encountered When it comes to strong winds and external forces, it is easy to scrape or knock down the push-pull parts or the glass, causing damage to people. Third, look at the price, under normal circumstances, high-quality aluminum alloy skid plate due to high manufacturing costs, the price is about 30% higher than the inferior aluminum alloy skid plate. At present, there are many self-employed households who process aluminum alloy skid plates, and they do not understand the structural characteristics and performance of aluminum alloy skid plates. In order to reduce costs, cut corners, shoddy, and product hazards are large, generally not suitable. It is best to use the products of regular aluminum alloy skid plate manufacturers.