The X-40 is the official pickleball of USA Pickleball and the US Open Pickleball Championships.The X-40 Performance Pickleball is a premium quality ball that will play well on any outdoor surface. This ball delivers the best in-game flight out of any ball on the market thanks to our machine drilled holes. The accuracy of the machine drilled holes will assure that each ball will play consistently one after another. The X-40 is the best pickleball on the market, try it for yourself today!