Unfortunately, I have my first, euphoric review revoked completely. I do not even know if you can ever give it one star. After repeated use, the frustration level rises higher and higher. First, it turned out that the rubber sealing ring "refuge", if you want to screw the needle so firmly in the pump, it is also tight. So the seal squeezes then sideways and it is still leaking than before. Furthermore, it was found that the needle in the threaded part is loose and so the air is blown everywhere, just not in the ball. I'm through with 5 needles and need an alternative.