b'Filter Media / High Temperature MaterialsNOMEX Felt (Aramid) Recommended continuous operation temperature .400FMaximum (short time) operation temperature 425FSupports combustion . NoBiological resistance (bacteria, mildew) No Effect Resistance to alkalies . GoodResistance to mineral acids . FairResistance to organic acids . FairResistance to oxidizing agents PoorResistance to organic solvents Very GoodAvailable weights 14 oz. - 18 oz.TORCON/PROCON Felt/PPS (fka Ryton)Recommended continuous operation temperature .375FMaximum (short time) operation temperature 400FSupports combustion . NoBiological resistance (bacteria, mildew) No Effect Effect resistance to alkalies ExcellentResistance to mineral acids .ExcellentResistance to organic acids .ExcellentResistance to oxidizing agents . FairResistance to organic solvents ExcellentAvailable weights 14 oz. - 18 oz.P84 Felt/PolymideRecommended continuous operation temperature .450FMaximum (short time) operation temperature 475FSupports combustion . NoBiological resistance (bacteria, mildew) . Good Effect resistance to alkalies FairResistance to mineral acids Good+Resistance to organic acids.Good+Resistance to oxidizing agents Good+Resistance to organic solvents ExcellentAvailable weights 14 oz. - 18 oz.www.standardfilter.com1.800.634.58371.760.929.8559 11'