In the field of heavy-duty vehicle air filtration, the product uses high air permeability, high-quality imported or domestic filter paper or nonwoven fabric as the filter medium. Under the rated air volume flow rate, the original filtration efficiency of the filter element is high, which can effectively intercept dust particles in the intake system to prevent them from entering the engine components and causing damage to the piston, piston ring, gasket and many other engine parts. PU glue is made of high-quality polyurethane sealing strips, which feature strong tensile strength, good elasticity, temperature resistance, aging resistance, and excellent sealing effect. The product is suitable for various climatic conditions. The end cover and inner and outer protective iron mesh of the metal filter are produced with high-quality electrolytic materials, which can effectively prevent the metal of the product from rusting and the strong adsorption of the engine from deforming the filter.