New Big Giant Pet Dog Puppy Tennis Ball Thrower Chucker Launcher Play Toy by Unbranded This Ministry of Warehouse Quality Tennis ball is made of a rubber core of a basketball and common felt of tennis ball, it's much thicker than a normally pet tennis ball. But if you doggie is very naught or fierce, please choose it discreetly. some kids are really a toy killer :) please notice that. You received the ball that is no air inside,you need to inflate it. BTW, please fill the ball as harder as possible. Genuine 24cm Diameter Tennis Ball, Super thick! Package include: 1 Pc tennis ball