Individually wrapped high capacity filter replacement cartridge pack for iSpring 7-stage RO systems Experience clean, safe, and good-tasting water every time you turn on the faucet. Enjoy crystal clear ice cubes, fresher tea and coffee, better tasting foods, healthier baby formula – even better than most bottled water 100 gpd RO membrane for superior performance with TDS rejection rate up to 97% (under NSF58 testing condition) Alkaline mineral filter produces alkaline water with restored healthy minerals such as natural calcium, magnesium, and potassium ions, which ph-balances the RO water 7 pieces of 10" x 2. 5" replacement water filters included: 1x sediment filter, 1x granular activated carbon filter, 1x carbon block filter, 1x 100 gpd RO membrane, 1x post-carbon filter, 1x alkaline filter, and 1x UV bulb Updated FA15 alkaline mineral filters and FT15 post-carbon filters are built with a secure push-fit quick connection, which allows faster filter replacement. If you have trouble installing the filters, please refer to the user manual or contact us