Nerf Dog 1.75in Squeak Tennis Ball 4-Pack - Blue/Green, Blue/Orange and Blue/Black, Dog Toy Interactive: Squeaking sound provides hours of entertainment Highly Visible: Brightly colored so you and your pet never lose track, no matter where you toss it! Nerf-quality materials allow this toy to be lightweight and durable Multiple in each pack so the fun doesn't stop Perfect for small and medium-sized dogs