The RFH Series filter cartrdrige has been designed to retrofit the Johnson Controls/Frick Super Filter II^TM used in Screw compressors for ammonia refrigeration applications. This filter is constructed with phenolic impregnated fine fiberglass with wire mesh support for robust pleats.  THE RFH series have been designed to be 99% efficient at 5 microns. This filter is available in Single, Double and Triple lengths to fit the various screw compressor sizes.