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.