1. Surface treatment of slide rail: This can be seen by the naked eye. You don't need to listen to too many sales stories, you can understand it naturally.
2. Slide rail structure and material: Look at the cross-sectional thickness of the metal material of the slide rail and its structure, the quality of the slide rail that usually uses many plastic parts is not as good as the all-metal slide rail.
3. Specific gravity: usually refers to the weight of the same length or volume unit, here refers to the weight of the slide rail of the same type (such as two rails).
4. Applicability: As soon as you stretch the lower rail, you can feel the weight, strength, and so on.
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