Purenex 4C-10B-4S5-10B 8 Cartridges for 10-Inch Big Blue Whole-House Water Filters, 4 Carbon and 4 Sediment Cartridges 4 Block Activated Carbon filters -10" Big Blue 4 Melt-blown Polypropylene Sediment filters - 10" Big Blue Individually wrapped Micron rating: 5 Micron Dimensions: 10" x 4.5"