The Gigwi Tennis Ball is made of non-abrasive original tennis felt and filled with no harsh dyes or synthetic rubbers, these won’t damage your dog’s teeth, and it’s more durable than traditional tennis ball toys. Gigwi Tennis Balls come in 3 different and brightly coloured tennis style balls that squeak when your dog catches or carries the ball in their mouth. Perfect for adding extra fun and excitement to everyday walks! Ball diameter 6cm.