The Amazon Basics Refrigerator Water Filter AMZN-LT700P-A is a white plastic cartridge designed for Aqua Optima compatibility. It offers carbon block filtration to remove chlorine taste and odor, providing clean water for your refrigerator. With a capacity of 200 gallons and a cartridge life of 6 months, this product ensures fresh and safe water for your household. Made by Amazon Basics, this advanced water filter is a reliable solution for improving the taste of your tap water in your convenience.