The Onix Outdoor Pickleballs are created by Onix Sports, a leading manufacturer in the pickleball world. These balls are slightly different than the other two outdoor pickleballs. The holes on these balls are all the same size, whereas the other brands have holes of varying sizes. Secondly, due to the way that these are made, they do have a very slight ridge along the outside of the ball where the mold came together. However, this is not a seam on the ball itself and does not compromise the ball's integrity. These balls are extremely durable, thanks to their tough plastic skin. The Onix Outdoor Pickleballs are incredible balls which proudly uphold Onix Sport's fantastic reputation for terrific products.