... mesh: aluminum net or stainless steel net 3.Function: air filter 4.EN779 class:G2, G3,G4 2012 New Design air intake Panel Filter with ... carboard- Pre filter Application: Filter dust , pre-filter through air filter programType: synthetic fiber ... /90F5 FRS-CXD-659529046850/170045/90F5 G3 , G4 fiber glass air intake Panel Filter with carboard- Pre filter