Device almost excellent ...

... If not rigid - I suspect - polyethylene tubing would. He must not be bent - it was clear to me from the beginning. After about 4 years now daily use, the hose broke but, right on the handpiece. If you do not have two left hands, the part can also be carefully opened and the tube shortens refit. Thus, the anyway short hose is even shorter ... so not a good basis for long life. But maybe I get somewhere before replacement. By the way, equipment was not purchased from Amazon but comes from a promotion of a large market.