Polypropylene bags are compatible with a broad range of corrosive fluids including organic solvents, oils, acids, alkalis and microorganisms. The Pentek BP-420-5 bag filter can withstand temperatures up to 200F (93.3C). The Pentek BP-420-5 filter bags are manufactured from felt because of its high solids loading capabilities, in comparison to similar mesh fabrics. The Pentek BP-420-5 filter media is created by needle-punching two layers of synthetic fibers together in a supporting scrim. A glazed finish, created by melting the outermost surface fibers, is used to produce a bond that reduces the possibility of migration. The Pentek BP-420-5 filter bag's thermally welded unique design results in consistent filtration efficiencies. The Pentek BP-420-5 filter bag is a 5 micron glazed polypropylene felt bag filter.