The Avalon Stage 2 Carbon Block Cartridge is a water filter designed for household use. This 2-stage filtration system utilizes carbon block and sand filtration methods to remove contaminants such as chlorine, lead, rust, and bacteria from your water supply. With a capacity of 1500 gallons, this multicolor filter is compatible with Avalon brand systems and is suitable for providing clean and safe water for your kitchen or household needs.