10” Jumbo PP Spun Sediment Water Filter (1, 5 & 10 Micron)USAGE Choose your micron rating from 1mic or 5mic (lower the micron the lower the sediment size removed, if using multiple stages, start with a higher micron down to a lower micron) Fits all 10" Jumbo water filter housings. Used as first stage in well water filtering, KOI, Aquarium and almost all other water filtering DESCRIPTION 10" Jumbo PP Spun water filter cartridge (For Removal of sediment, dirt, rust, particles). Used as a first filtration