Amazon.com: 25 Micron Sediment Water Filter Cartridge 10"x 2.5", Four Layers of Filtration, Removes Sand, Dirt, Silt, Rust, Made from Polypropylene for any RO Units or Whole House Water Filtration Systems 6
Whole House 25 Micron String Wound Polypropylene Filter 20" | APEC Water
Micron Ratings - A Better Understanding & Breakdown