The Philips Reverse Osmosis RO Water Filter System in Silver and Black is a compact countertop water filter with a 5-stage filtration method for removing micro-organisms. With a capacity of 16.9 fl oz, this water filter is suitable for household use and features special features such as a change filter indicator, lightweight design, portability, and the ability to reduce total dissolved solids (TDS). Made of acrylonitrile butadiene styrene, this filter is designed for water purification and is compatible with various models of water purification systems.