The FRANKLIN PET SUPPLY CO® RSF mini tennis balls are a major upgrade to you and your pets play time! Throw out the old boring tennis balls and enhance the active play experience with these assorted color mini tennis balls. Our tough and durable material hold up to slobber and dirt. These balls are 1.75" mini sized perfect for your smaller dogs. Show your pet how much you love them with the best fetch ball around, RSF Mini Tennis Balls!