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Choose a pulley with a large weight. Whether or not the sliding door can be used for a long time depends on the quality of the pulley. If the load-bearing capacity of the pulley is not enough, its service life will be greatly affected, leading to poor push-pull, noise increase, or no use at all. Pay attention to the metal material of the sliding door. In order to prevent the door panel from being deformed, the material of the frame of the sliding door is mostly made of metal. The quality of metal materials directly affects the service life of sliding doors. At present, the metal materials of sliding doors on the market are mainly carbon steel and aluminum alloy. The most expensive ones are aluminum-magnesium-silicon-titanium alloys, which have strong support and door leaf deformation. At present, some brands in the market claim to be aluminum-magnesium-silicon-titanium alloys. In order to avoid being caught in the market, they should ask the merchant to present the inspection report of the commodity inspection department. Experience the sliding effect carefully. The high-quality sliding door is of high technical content. When it slides, it will neither be too light nor too heavy, but with a certain weight of the door. When sliding, there is no vibration, smooth and texture.