The 2 PACK Aquasana AQ-5100R Replacement Single Stage Under Counter Water Filter is a high-quality water purification system designed for household use. Made of durable white plastic, this filter is compatible with the Aquasana 1-Stage Under Counter Water Filter System. It features a capacity of 0.5 L and uses carbon/charcoal filtration method to remove contaminants such as asbestos, bacteria, chemicals, chlorine, copper, cyst, fluoride, and iron. With a California Prop 65 Warning, this under-sink unit is a reliable choice for clean and safe drinking water in your kitchen.