1. Qualification: A legitimate manufacturer has information such as * * (registered trademark), address, phone number, testing report, quality certification, etc.

2. Quality assurance period: Do you have a clear understanding of how to * * quality, how to solve problems within the quality * * period, and not buying three non products

3. Identification: The product image is clear and the description is reasonable, and the inspection report should include the product image.

4. Product parameters: Products produced by legitimate manufacturers include product parameters, composition, proportion, strength, etc.

It can be used for 5 or 10 years instead of 5-10 years. This difference is significant. The design life and actual life are different.

The car wash grille, commonly known as fiberglass grille, is a high-strength fiber material designed according to standards of 20 or even 50 years. However, due to the harsh car washing environment and long-term immersion in sewage, the strength and corrosion resistance requirements of the grille are high, and the service life is greatly shortened.