iSpring F28K75 3-Year Filter Replacement Supply Set For 6-Stage Reverse Osmosis Water Filtration Systems Tested by independent third-party to meet NSF/ANSI Standard, high capacity replacement filters for 6-stage reverse osmosis systems Standard sized 10" x 2.5" Fits iSpring RCC7AK, RCC7P-AK, and most other RO systems that use standard sized filter housings including Flowmatic, PuROLine, Crystal Quest, and Apec Includes 6x FP15 sediment filters, 6x FG15 GAC filters, 6x CTO carbon filters, 1x RO membrane, 3x FT15 post carbon filters, and 6x FA15 alkaline remineralization filters Each filter is individually wrapped to preserve freshness and extend shelf life