I purchased an inexpensive inflatable sup on eBay and loved it till the valve broke just a month into using. I found out the hard way, there is NO customer service to be found. I bought a valve on Amazon and it just would not fit into the threadings and hold the air quite right. I was about to give up when I found this inexpensive valve online and decided to give it a try. It arrived super fast, and fit so smoothly and I was paddle boarding the next day! I actually went back and bought two more to have on hand should it break again! Thanks so much!