Cartridge Kit, System 3 S7M120, with Manifold, The 17-175-2700 is an all-inclusive replacement kit for the /StaRite System 3 Filter Cartridges. This kit includes:(1) 100 Square Foot Filter Cartridge(1) 200 Square Foot Filter Cartridge(1) Manifold - This manifold is needed ng with the cartridges for proper installation
