The cleaning/unblocking of our Ethylene tubes was much faster than we expected, and believe me we have a lot of experience with these tubes! Actually 3-4 times faster than our site contractor i.e. 5 furnace tubes per day instead of 1 per day! – Absolutely no damage to the furnace tubes/other equipment. Excellent. It was really amazing to see how quick all the neccessary steps were taking to start the job. We will make use of the Tube Tech services again.