iSpring F31KU75 3-Year Filter Set for 7-Stage UV Alkaline Reverse Osmosis Water Filter, Fits iSpring RCC7AKUV (31pcs 6SED 6GAC 6CTO 3T33 1MC7 3UV 6AK) 31 pieces of 10" x 2.5" Replacement Water Filters included, good for 3 Year Supply. Individually wrapped to keep freshness Fits iSpring 7-Stage RO Alkaline UV Water Systems and most other brand name RO systems Produces perfectly PH-balanced alkaline water and gives back healthy minerals UV kills 99% of bacteria and virus that remain after the reverse osmosis process; 11W UV Sterilization Lamp included 75 GPD Thin Film Composite (TFC) Membrane included, tested by independent third-party to meet NSF/ANSI Standard