Specially designed balls do not need air to inflate. Will not puncture or deflate. Convenient handle allows horse to pick up ball and play with it. Can be hung or placed directly in stall without fear of injury to your horse. Comes in 4 convenient sizes - 6", 8" or 10" which are all recommended for either horse or pet, and the 4 1/2" size which is recommended for pets only. Available in red, blue, and purple.