I was using these as Brita water filter replacements. I have three left over, so I'm putting them up for sale. I will ship them in simple packaging without the box. [Product Overview] This is a water purifier cartridge. They are individually packaged, so you can use them with peace of mind. [How to Use] By attaching it to a water purifier, you can improve the quality of your drinking water. Regular replacement is recommended, and it's important to maintain the filter's performance. [Features] The high-performance filter purifies water and supports water quality management in the home. It is especially useful when used for drinking water and cooking. - Quantity: 3 - Type: Water purifier cartridge - Package Condition: Unopened - Expiration Date: April 15, 2027