Open box/packaging. This set of three Aquatru filters includes a pre filter (AT2001) and two-stage VOC carbon filter (AT2003). The filters are designed for household use and are suitable for removing chlorine taste and odor from water. Made of white plastic, these filters are compatible with Aqua Optima brand systems and AquaTru models. The filtration method is reverse osmosis, providing clean and safe water for your household needs.