This promotional offer applies only to the listed variants starting with 625579xx xx variant identifier the spiky ball has a 12cm diameter making it the perfect toy for large dogs the nubs on the surface of the ball not only make it easy to grip but also gently massage your dogs gums this promotes blood circulation and helps to improve your pets oral hygiene dogs will love playing games of fetch with this great bouncy ball which also has a pleasing vanilla scent the large spiky b