Product was complete waste of money. Quality control is non-existent with the tubes having a blockage due to poor glue handling. In addition, the pump had absolute minimal suction power. All the pump will do is exercise your finger muscles. After rebuilding using a pump from a pussy pump and finding a way to clear the blockage I got it to work but that required a complete strip down and rebuild. Given a "All sales are final" approach don't waste $60 on this product unless you enjoy engineering as if you get a flawed product you've just blown $60 for a hunk of junk.