3M Aqua-Pure Under Sink Replacement Water Filter &ndash; Model AP-DW80/90 APDW80 (5 Micron Nominal) & APDW90 (1 Micron Nominal) Two stage cartridge includes composite media for sediment, chlorine taste and odor, lead and cysts. Second cartridge: carbon block for VOC and MTBE High Capacity: 625 gallons or 1 year Cold water use only