iSpring F17U100 2-Year Replacement Filter Set for 100GPD 6-Stage UV Reverse Osmosis Water Filter, Fits iSpring RCC1UP RCC7U 17pcs 4SED 4GAC 4CTO 2T33 1MC1 2UVB11 17 pieces of 10" x 2.5" Replacement Water Filters included, good for 2 Years Supply Individually wrapped to keep freshness Fits iSpring Reverse Osmosis Ultra Violet Water Systems and most other brand name RO UV systems UV kills 99% of bacteria and virus that remain after the reverse osmosis process; 11W UV Sterilization Lamp included 100GPD Thin Film Composite (TFC) Membrane included, tested by independent third-party to meet NSF/ANSI Standard