PUREPLUS 5 Micron 10 x 4.5 Whole House Sediment and Carbon Water Filter Replacement Cartridge for GE FXHTC

The filter has three Layers. Micron rate differs from outside to inside. Outer layer is 10 micron. Middle layer is 7 micron. Inner layer is 5 micron. By this way, the filter not only has bigger dirty capacity, but also assure the filtration effects.