5 Stage Reverse Osmosis Drinking Water System RO Home Purifier 15 Total Filters 4 Yr Filter Supply Under Sink Filter Kit Solid Quality 5 STAGE REVERSE OSMOSIS DRINKING WATER SYSTEM RO HOME PURIFIER 15 TOTAL FILTERS 50 GPD 5 Stage Reverse Osmosis Drinking Water System Comes with color coded tubing for easy installation Complete System all installation hardware. Also has Quick Connect Fittings and an Installation Manual for easy and simple installation. Total Filters Included  4 Sediment Filters  4 Carbon Block Filters  4 GAC Carbon Filters  2 GAC Carbon Post Filters  1 Membrane (50GPD)