I bought an hqd for 6000, if for the first time a nice girl changed a defective one to a good one after checking, then today the guy just convinced for 10 minutes that it needed a few hard ones and it would stop hissing, and the truth is after a couple it stopped, came home, again it hisses, then it does not stretch. In general, I do not know where they are imported from, but marriage seems to be OK with them.