air filter assembly 1.QB4100 air filter assembly 2.Be corrosion resistance 3.Surface is ... 4.Has passed ISO9001 air filter assembly1.This Products is QB4100 air filter assembly2.Effectively filter dust and sand in the ... 62±0.3mm nameair filter assemblymodelQB4100surface treatmentbe polishedprocessstamping ISO9001 product QB4100 air filter assembly,4100QB filter