Express Water FLTGAC0550 GAC Granular Activated Carbon 5 Micron Taste, Odor, VOC Coconut Shell Carbon Water Filter 10" Standard (Pack of 50) 5 Micron Rating Coconut Shell Granular Activated Carbon (GAC) Removes Chlorine, Organic Chemicals, Bad Taste and Odors Dimensions: (2.5"-Inch O.D.  9.78"-Inch L) Industry Standard 10" Performance Tested and Verified by independent Laboratory Testing. Complies with NSF Standards and Regulations. Made from RAW Organic Minerals