Two of these tubes were purchased to replace the tubes on my HF wagon which never stayed inflated for more than a few hours at a time. After years of having to inflate them every time I wanted to use the car, I gave up and ordered two of these replacement tubes. On arrival they looked good, smelled better and seemed to be holding air. Both old hoses had a slow leak at one of the seams, not a hole. Once installed and ventilated, they are still fully inflated after a week. It's a shame that you have to spend as much for two good inner tubes as the wheels and tires originally cost. But they make everything worthwhile.