I needed something to fix the old brittle vacuum lines in my mom's old 2000 Dodge Durango that just wouldn't come loose. That was excellent. The hole is the same size as the hole in the small plastic tubing, so I was able to fit sections of it over the tubing where there were cracks or breaks, and also replace entire tubing elsewhere as the material stretches easily. Spring. It's flexible, not hard plastic, but you can tell it's sturdy enough to never break. I was even able to get her cruise…