... Supply Sample! G2, G3 grade air filter, pre-filter, primary filter, washable filter, MERV filter, RELAB filter, EU2 filter, paper filterFeatures:Capturing 5 micron ... EU3MERV Rating: MERV5, MERV6Media: Synthetic fiber(Nonwoven cloth)Frame: Galvanized Steel, Aluminum alloy, CardboardRated initial pressure drop ... of wet non-woven polyester filter material to ABS, PP, PC, PVC plastic box for the material. ...