A simple method to distinguish genuine from fake air filters

If there is a pungent smell of recycled plastic when you open the package, it must be a counterfeit. Genuine air filters have no pungent smell. The overall workmanship of the filter element is not neat, the filter paper is not neatly arranged, and there are obvious flaws. If the material is thin, it can be determined to be a counterfeit. The filter paper of the genuine filter element has a high degree of regularity, is relatively thick, and has strong air permeability.