This 4.5" x 10" carbon block filter cartridge is designed for use in standard 4.5" x 10" filter housings. Constructed from mineral-based activated carbon, it provides 5 micron nominal filtration while reducing free chlorine, trihalomethanes (THMs), organic chemicals, taste, and odor. Commonly installed as a pre-filter before an RO membrane to reduce chlorine exposure that can shorten membrane service life. The cartridge should be flushed for 5 minutes prior to use. Suitable for residential, commercial, or industrial water filtration systems. Recommended 5-minute flush prior to operation Key Features: Fits standard 4.5" x 10" filter housings 5 micron nominal rating Activated carbon block construction 99% nominal chlorine reduction Reduces THMs and organic contaminants including herbicides and solvents Polypropylene outer layer to limit carbon fines release Individually sealed Rated capacity of 60,000 gallons Specs: Dimensions: 4.5" x 10" Micron rating: 5 micron nominal Capacity: 60,000 gallons Flow range: 1–8 GPM (service interval varies by flow rate) Media: Mineral-based activated carbon Outer layer: Polypropylene Sold as: Single cartridge