The product is a set of 10 Lightning Mini Training Pickleball Balls, divided into 2 packages of 5 balls each. These yellow balls are made of polyethylene with a diameter of 42 millimeters, suitable for adult pickleball players. Each ball is designed to provide a consistent and controlled bounce for training purposes. The package dimensions are 6.3 x 4.41 x 1.69 inches, with a total weight of 0.03 kilograms. Ideal for honing your skills in the sport of pickleball, these mini training balls offer a fun and effective way to practice your game.