The Culligan® CW-F 2-pack Level 3 Advanced Filtration cartridge reduces sediment, rust, scale, dirt, coarse sand, sand fine sand and silt. The replacement cartridge fits the following models: HF-150A, HF-160, HF-360 and most standard size housings. The filter is recommended for use with city and well water supplies. The cartridge life is up to 3 months or 12,000 gallons. Cartridge change reminder sticker included.