FCDP Series filters are composed of graded density, melt blown, polypropylene media and are designed for high efficiency prefiltration or post filtration of DI applications. All materials are FDA listed for contact with food and beverages. Code 10 filters feature a single open end with one 120 O-ring and a flat closed end. Code 10 filters are generally called ""Pentek"" style as they fit into standard Pentek® housings.