Reverse Osmosis Revolution 4 pcs 5 Micron 20"x2.5" Sediment filter cartridges for Whole House Water Filter This Sediment filters fit Whole House Filters and Simple Water Filters with Standard 20"x2.5" housing . 20" x 2.5" Sediment Filter, Removes: dirt, silt, sand, rust, and scale particles. 5 Micron rating. Qty of 4 Service life: 3-6 months.