Hi,
Thank you for your post, I placed a call into Hydor to get the measurements for you since I currently do not have any in stock at this time. The actual length of the heater from the barb fitting from each end is 11 3/4 inches long. We should have them available for sale in the next few weeks. If you have any further questions please do not hesitate to contact us at 714.385.0080.
Walter
Marine Depot Customer Services
