AquaFlo 25 Micron 4.5"x 20" String Wound Sediment Filter / Part# 36143 - the water guys
Pentek Spun Polypropylene 20" x 2.375" 25 Micron Sediment Filter
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
Donaldson 1C120032-25 Filter Element, PE 05/20, 25 Micron