FOR ANY QUANTITY
The only Problem I have with all softballs is they are heat sensitive. Playing in tourneys all day with a dozen softballs in your bag at 90+ degree heat makes them soft. I always keep 6 or more at the house for this reason. Dudleys will last a long time and maintain there good quality if you take care of them (keep them out of the sun or in a hot vehicle).
The ball guy
The best ball that I have used in a while. The cover feels really nice compared to the protac covers of some other brand of balls.