This replacement filter cartridge is designed for use with 3M Aqua-Pure Under Sink Water Filter System AP-DWS1000. Its NSF certified to reduce particulate, chlorine taste and odor, lead, parasitic protozoan cysts and select volatile organic compounds (VOCs) and MTBE. The Sanitary Quick Change design allows for fast and easy change-outs without having to contact the filter media or the need for a filter wrench. Treat your family to cleaner, clearer and better tasting drinking water.