This is the replacement 10" water filter that goes with our 10" Water Filter System, or it can be used in any standard 10" filter housing to remove off-flavors and odors from your water. Recommended to store dry when not in use. California Proposition 65 ⚠ Proposition 65 Warning: This product can expose you to chemicals that are known to the State of California to cause cancer and birth defects or other reproductive harm.