... steel net 3.Function: air filter 4.EN779 class:G2, G3,G4 2012 New Design air intake Panel Filter with carboard ... Protect mesh: aluminum net or stainless steel netEN779 class:G2, G3,G4,F5Average arrestance:84%-90%(ASHRAE52.1-1992)EUROVENT4/5 ... FRS-CXD-5595595461700/340045/90F5 FRS-CXD-659529046850/170045/90F5 G3 , G4 fiber glass air intake Panel Filter with carboard- Pre ...