HydroLogic 22105 Small Boy Sediment Filter, 2.5" L x 10" H Replacement sediment filter for Small Boy RO filter Keeps silt, rust, sand, and other particulate matter out of your water supply Estimated 3,000-gallon capacity Removes Silt, Sand and Rust From The Water Supply Small Boy Replacement Sediment Filter Estimated 3,000-Gallon Capacity