I have an unused Tusa Octo. I purchased this about 15 years ago and never used it. It still has the red cap on the end of the hose. Even though it has never been used, I also haven't serviced it. I would recommend having it serviced since the orings are 15 years old. It has always been stored indoors. I am not sure what the model number is since I purchased it as part of a kit and immediately went to an alternate air source and didn't need the octo. 34" hose.