AquaPure DWS80/90 Dual Filter Replacement Cartridges by 3M Purification Reduces particulate, chlorine taste & odor, lead, turbidity, parasitic protozoan cysts, VOCs and MTBE Advanced dual stage carbon-block filtration process to help provide cleaner, clearer better tasting drinking water. NSF certified. AP-80/90 is a set of 2 filters for the AP DWS 1000 drinking water filter system. APDW80 (5 Micron Nominal) & APDW90 (1 Micron Nominal) High Capacity: 625 gallons or 1 year. Two Stage Cartridge Includes Composite Media for Sediment, Chlorine, Taste and Odor, Lead and Cysts. Second Cartridge: Carbon Block for VOC and MTBE. Sanitary Quick Connect Design Allows for Quick and Easy Changing with Minimal Effort. #5585102