To distinguish the true air filter from the false air filter, it mainly depends on the fineness of the filter paper and the strength and toughness of the rubber edge. The filter paper strength of poor air filter is very poor, it can be torn off with a little force, and the rubber edge toughness is very poor, easy to break.

1. Pay attention to brand selection. When purchasing the air filter, you should choose a big brand with certain popularity, and try to buy it from a brand authorized dealer or brand flagship store, instead of buying Sanwu products at a low price.

2. Pay attention to the inner and outer packing: check the outer packing and inner packing of the air filter for obvious and clear product related information, including production date, product number, brand, etc. Poor products often lack this information, or the handwriting is not clear and neat.

3. Pay attention to the material structure: compared with the genuine air filter, the filter paper of inferior products often has fewer folds, large gaps, poor hardness, rough workmanship, easy to twist and collapse, uneven height and thickness.

4. Pay attention to the sealing strip: the sealing strip of the air filter, the workmanship of the authentic product will be more regular, the rubber used will be of good quality, and the elasticity will be better, which is not easy to be damaged. The sealant strip used for fakes is inferior and smells of pungent rubber.