Transform your home's water quality with the KX MATRIKX 32-450-20-GREEN CTO2-HD20 whole house water filter cartridge, featuring advanced activated carbon filtration technology that provides drop-in replacement convenience for your existing big blue filter housing. This premium 20x4.5 activated carbon water filter combines dual-purpose functionality as both a sediment and activated carbon filter, removing chlorine, taste, odor, and particulate contaminants from your entire home water supply. No professional installation required - simply replace your existing cartridge in minutes with this easy-to-install whole house carbon filter replacement. The innovative radial flow design maximizes contact time with activated charcoal media housed in a durable plastic construction, ensuring superior dirt-holding capacity and extended filter life compared to standard GAC filters. NSF certified and meeting ANSI and WQA standards, this competitively-priced 4.5x20 water filter delivers reliable whole home water filtration performance. The carbon block water filter technology provides comprehensive contaminant removal while maintaining optimal water flow rates throughout your house water filter system, making it the ideal choice for homeowners seeking professional-grade water purification without the premium price tag. Additional Details ------------------------------ Size: 4.5" x 4.5" x 20"