air filter made by ERIDAE have maximum life 8000 hours can be used good quality and competitive price air filterHC Level (HF Grade 9) Main Pipeline FiltersFeatures Section 1: has a detachable stainless steel mesh core used to separate solid/liquid particles of 10μm or bigger by centrifugal forces.Section 2: has a replaceable glass-fiber used to completely separate the solid/liquid particles of 3μ ...