Culligan AC-30 Compatible Filters, KleenWater Replacement Cartridge and Membrane, Set of 4 Culligan AC-30 Compatible Reverse Osmosis Cartridge Replacement Set with Membrane (Module) (1) dirt / sediment pre-filter (Made in America KleenWater) compatible with 00-4015-38 (1) carbon block post filter (Made in America by KleenWater) compatible with 01-0125-80 (1) prolonged in-line carbon cartridge (Made in America by KleenWater) compatible with 01-0042-91 (1) 50 gallon per day membrane material Made in the USA compatible with 01-0074-02