Culligan AC-30 Reverse Osmosis System Compatible Replacement Cartridge 3 Set Multi-Pack by KleenWater Generic Culligan AC-30 Reverse Osmosis Cartridge Replacement Set Not Compatible with Culligan Aqua Cleer Reverse Osmosis System (1) dirt / sediment pre-filter (Made in America by KleenWater) (1) carbon block post filter (Made in America by KleenWater) (1) prolonged in-line carbon cartridge (Made in America by KleenWater)