Dog Tennis Ball "BONE"anza Toy Two of a Dog's Favorites Tennis Ball and Bone United. Perfect for the Game of Fetch Constructed of Very Durable and Thick Tennis Ball Material. Non-abrasive tennis material will not wear down your dog's teeth Non-abrasive tennis material will not wear down your dog's teeth Dog Toy Measure 6.5" in length Designed for Dogs of all Ages. Bright yellow color easy to find in tall grass