The Whirlpool compatible TW30-1810-50 is a reverse osmosis membrane.
The Whirlpool TW30-1810-50 RO cartridge is a tightly wound special membrane that removes dissolved solids
and organic matter when water is forced through the cartridge.
Use these filters with EcoWater Sears Kenmore UltraFilter 350, 450, 500, 550 RO Systems and the Whirlpool WHER18 RO System.