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RockFilter with below features:
1. Premium quality Glue make the metal cover never separate with paper;
1. Good quality gasket to guarantee filter fit tightly with filter housing
2. Enough folded paper with enough filtration area to reduce fuel consumption.
3. Dehumidification and moisture proof.
4. Excellent air permeability with low airflow resistance.
5. Premium dust holding performance with long life time
6. Stable quality during whole warranty quality period.