... : supply pads or rolls sizeMedia: synthetic fiber with gradual density, inlet side is blue.Washable: about 4-5 timesEN779 class: G3 ... , Heat-Resistant Air Filter, all kinds of Pocket, Plank, Foldaway Filters, Primary Filter, Secondary Filter , HEPA Filter, Activated Carbon ... Filters, and all different kinds of clean products and equipments used ...