The Axeon Inline GAC Carbon Post Filter (206682) is 8" in length and is specifically designed for the Axeon CRO-50 Reverse Osmosis unit.
The Axeon Inline GAC Carbon Post Filter (206682) has been discontinued by Axeon. Use the Omnipure K2333-KK as a replacement inline filter. Please make sure to use the KK connections of the K2333 for proper inline use with the CRO-50.