... chemical stability,air permeability , the filter felt can be used as carrier of adsorbing water-solubility (oiliness) biochemistry reagent ... in strainer. To filter, separate ,cleansing producers' goods.Widely used for gas ,liquid filtering of industry,commerce,civil ... pharmacy ,food,hospital,chemical industry and national defence.Have filter mat of fiberglass,synthetic,compound type . Type : Z-GMWeight ...