Doggy Fun 5 Ball Pack - 5 Small Replacement Toy Dog Balls for the Doggy Fun Automatic Dog Ball Launcher / Automatic Fetch Machine Doggy Fun 5 Mini Tennis Ball Replacement Pack - for use with the Doggy Fun Automatic dog ball thrower/launcher or can be used as normal dog fetching balls. Pack of 5 mini tennis balls (1.5") - Smaller than standard size tennis balls Made for the Doggy Fun Automatic Interactive Dog Ball Fetching Machine Specifically for Small Dogs only. Please note: LARGE dogs may prematurely DAMAGE these balls! Non-abrasive and fine for dog's teeth. Great dog ball toys for smaller dogs!