Product Descriptionthe F19K75 3-Year Filter Pack Comes With A Total Of 19 Replacement Filters So The Filters Can Be Changed On Schedule For 3 Years4X 5 Micron 10 Sediment Filters (1St Stage, #Fp15): Removes Dirt, Rust, Sand, And Other Particles Replace Approximately Every 6 Months4X 5 Micron 10 Granular Activated Carbon (Gac) Filters (2Nd Stage, #Fg15): Absorbs Chlorine, Halide, Organic Contaminants, Odors, And Other Impurities That Contribute To Bad Tastes And Odors Replace Approximately Every 6 Months4X 5 Micron 10 Cto Carbon Block Filters (3Rd Stage, #Fc15): Further Removes Any Remaining Chlorine, Tastes, And Odors Replace Approximately Every 6 Months1X High Rejection 0001 Micron Tfc Reverse Osmosis Membrane (4Th Stage, #Mc7): The Heart Of The Ro System Produces Drinking Water At A Rate Of 75 Gallons Per Day Replace Approximately Every 2-3 Years2X Post Carbon Inline Filters (5Th Stage, #Ft15): Polishes The Water From The Tank Before It Is Delivered To The Faucet Replace Approximately Every 12 Months4X Alkaline Ph Remineralization Filters (6Th Stage, #Fa15): Adds 05 - 08 Ph Back To The Water Also Adds Back Healthy Minerals Such As Ionized Calcium, Magnesium, Sodium, And Potassium Which Were Removed During The Ro Process Replace Approximately Every 6 Monthsthis Filter Pack Fits The Ispring Rcc7Ak, Rcc7P-Ak, And Most Other Ro Systems That Use Standard Sized Filter Housings Including Flowmatic, Puroline, Crystal Quest, And Apecfrom The Manufacturerproduct Description What Is Included - 4 Pieces Of 5 Micron Sediment Filters #Fp15 - 4 Pieces Of Granular Activated Carbon (Gac) Filters #Fg15 - 4 Pieces Of 5 Micron Cto Carbon Filters #Fc15 -1 Piece Of 75Gpd Ro Membrane #Mc7 - 2 Piece Of Post Carbon Inline Filters #Ft15 - 4 Piece Of Alkaline Mineral Filters #Fa15 Fit Models -Rcc7Ak -Rcc7P-Ak -Most Other 6-Stage Alkaline Ro Systems Specifications & Dimensions - Length: 9 34, Od = 2 78 - 14 Fitting -Weight: 19 Lbs