3 Stage 100 gpd Aquarium RO System Complete Replacement Filter SetDESCRIPTION: Contains all 3 replacement filters on the 3 stage compact system. Stage 1 Inline PP Sediment for reduction of heavy sediment, rust and dirt greater than 5micron Stage 2 Inline Activated Granular Carbon media for chlorine,heavy metals and organic contaminant reduction. Stage 3 100gpd Reverse Osmosis Membrane for removal of 97. 8% or greater of all known contaminants. SPECIFICATION: Dimensions: Approx. 10" x 2" Inlets and Outlets: 1 4"