F9 non-woven fabric pocket filter                                                                                                       Aluminum or galvanized iron frame with ultrasonic welded pocket media. Leak proof design, good air permeability, large filtration area, it is recognized as the best middle efficiency filter. Normally it is marked in different colors according to its filtration class.

Can be used as an ideal primary or middle efficiency filter, widely applied to commercial building or all kinds of industrial ventilation system, such as pharmaceutical factory, automobile and food factory, etc.