... s designed for pre-filtration or fine-filtration in air handling systems or air condition systems. ... filtration or fine filtration in the air handling or air condition system.Type:Pocket Filter Synthetic used for ... F5, F6, F7, F8, F9Kind of pocket filter media:Washable pocket filter synthetic: G2, G3, G4, F5 Fire ... -retardant pocket filter synthetic: G2, G3, G4, F5, F6, ...