RO FILTERS 1-YEAR REPLACEMENT KIT-ICP-ROKIT01 Compatible with Universal 50G/75G/100G RO water filter system NSF42 Certified filter set for reverse osmosis systems 2 sediments 1st stage,2 GAC 2nd stage,2 CTO 3rd stage,1 Post carbon 5th stage Include 7 pieces of 10" x 2.5" filter cartridges, last 6 - 12 months depending on water quality fits 10" filter housing for RO filter system IMPORTANTPlease Be Aware That This is A Compatible Spare Part, The Manufacturer`s Names, Part Numbers Have Been Used For Compatibility Information ONLY.