The balls are offered in the famous competition balls Joola *** - quality. They are designed for extreme competition and tournament conditions and naturally meet the ITTF rules. As a "highlight" are printed these balls with a Rosskopf- imprint. I use functions in this club in training, as they are distinctive by the imprint. So I am very happy with the balls and have been able to find any disadvantages. At the current price you should definitely strike! - For equivalent balls you pay somewhere else far more than double!