Purenex 6PP-10B Big Blue Whole House Water Filter Sediment, 10-Inch,  6-Pack Melt-Blown Polypropylene 4-layer graded density with a 1 micron nominal filtration rating Melt-Blown Polypropylene 4-layer graded density with a 1 micron nominal filtration rating 6 filters, individually wrapped Removes dust, particles, and rust Filter life: 10,000- gallon