Outdoor pickleball. Using only the best PE material and an advanced single piece design, this ball will withstand hours of the most aggressive play. The X-Performance 40 balls deliver a superb flight path thanks to the precision of our machine drilled holes. Perfectly weighted and sized, these balls will certainly impress anyone on the court. The X-40 is now the official ball of the US Open Pickleball Championships. Official competition-grade pickleballs are 26 grams in weight with a 74mm diameter to conform to official USA Pickleball standards. Constructed with 40 precisely machine drilled holes for a balanced flight pattern and tight, reliable spin. The no-seam, one-piece construction ensures a stronger, longer lasting ball that resists dents and cracking. Includes (3) X-40 pickleballs with ball tube that can be used for storage when off the court.