The NERF DOG 4-Pack of 2.5? Squeak Tennis Balls will entertain dogs for hours on end. The durable felt body stands up to extended chewing and makes an interactive squeaking sound that dogs love. Great for toss and fetch, or solo play sessions. Features Durable felt body stands up to extended chewing Interactive squeaking sound Great for toss and fetch or solo play 4-pack of 2.5? balls Specs Weight: 0.51 lbs Dimensions: 2.5 x 4.9 x 8.07 in