A part used to replace the filter in filtration systems that rely on activated carbon to remove odors and purify water or air. Activated carbon absorbs and adsorbs organic matter and unwanted odors, improving the quality of treated water or air. Filter replacements are replaced regularly according to the manufacturer's recommendations to maintain effective system performance. This type of refill is used in home water filtration systems, air filtration systems, and other applications that require effective filtration by activated carbon.