The CW-F polypropylene wound standard duty filtration cartridge works in HF-150A, HF-160, HF-360A, and HF-365 whole house filtration systems Perfect for residential homes, helps protect appliances and pluming from sediment and scale Features a flow rate of 4 GPM and filter life of 3 months/12,000 gallons (depending on usage and water conditions) Not recommended for untreated well water Reduces: sediment, rust, scale, dirt , coarse sand, sand, fine sand and silt The HF-150A is tested and certified by WQA against NSF/ANSI Standard 42 for materials safety and structural integrity only Micron rating of 10 (the smaller the micron rating, the smaller size patricle the cartridge will filter) Compatible with Culligan model HF-150A, HF-160, HF-360A, and HF-365 **Please note this is a compatible spare part and the manufacturers' names, photos and part numbers have been used for reference purposes only.