Coco*Store New Giant Tennis Ball Pet TOY Signature Mega Jumbo Big Tennis Ball Genuine 24 Diameter Tennis Ball, Super thick! Use for signature or pet toy (My dog loves this type tennis ball very very much). Dear buyer, This 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. BTW, please fill the ball as harder as possible. Package include 1 Pc tennis ball