KONG Air Dog Squeakair Tennis Balls are just what they look like: 100% pure tennis balls made in the same factory, using the same materials as any high-quality tennis balls. Air KONG Squeakers units are hidden and covered by the tennis ball material.
Sizing Reference: Standard size tennis balls would be the Medium Squeakair Tennis Ball.
Very Important: No dog toy is indestructible. Supervise your dog’s use of KONG Squeakairs until you are confident they can be used safely without supervision.