Marketing InformationNeo-Pure MB Series standard melt blown sediment cartridges are made of spun bonded 100% polypropylene creating a cartridge that has high dirt holding and chemical capacity. Filters available in 2-1/2 and 4-1/2 in (BB®-style) cartridge diameters and other lengths. The 4-1/2 in Dia graded density pore structure provides true depth-style filtration for higher dirt holding capacity. Micron ratings are available from 1 to 50 um. MB Series sediment filters have been tested and certified by NSF International to NSF/ANSI Standard 42 for material safety only.