The Nerf Dog Solid Tuff Sports Balls Dog Toy pack comes with four solid tennis balls featuring popular sports ball designs. Baseball buffs, soccer enthusiasts, volleyball players and pool sharks will enjoy these bright toys that represent their favorite sports. They have a solid interior and a soft felt exterior, the perfect combo for extended chewing session or interactive play. Can be used to load up Nerf Dog Tennis Ball Blaster Animals & Pet Supplies > Pet Supplies > Dog Supplies > Dog Toys or as durable fetch toys.