Penis dilator for 20 hrs. In the penis. It works great. At first it was the urination does not work so well that the bubble must build a higher pressure because the starting hole is head of the penis and then the urine can flow. At first it was after I had installed the ring with 28 mm inner diameter and even tweaked but the ring was attached to the bracket properly under the penis head of the dilator has also kept. Even in sleep that was no problem. You can say there is a constant irritation and the penis is retired almost always semi-rigid when touched it swells almost abruptly to to full strength. This penis dilator is recommended.