Air intake filter series is mainly used as general pre filtration in purification systems. This pre filter is the common filter media to filter the particles and suspended particulates which are ≥ 5μ m. The filter efficiency is 40%, 65%, 80%, 90% at 5μ m and conformed to EN779 standard G1, G2, G3 and G4. This filter media is made from synthetic thermobonded fibers with PET and PP.