Brand new AquaTru Stage 3 reverse osmosis replacement filter in original box. Clear AquaTru branding on packaging. Specifically designed for AquaTru Classic, Classic Smart, and Under Sink Water Purifiers Reverse Osmosis Filter (Stage 3): Reverse Osmosis membrane removes contaminants down to 1/10,000 of a micron Certified by IAPMO: Meets NSF standards to reduce toxic inorganic contaminants, including arsenic, lead, and chromium-6 Filter Life: Lasts up to 2 years or 1,200 gallons, whichever comes first