10” Jumbo String Wound Sediment Water Filter (1–50 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 filter housings. Used as stage 1 in sediment water filtering. Hard Well Water filtering, KOI Aquarium filtering DESCRIPTION 10" JUMBO String Wound Sediment Water Filter Cartridge is used for the removal of sediment, dirt, rust and particles. Used as a