Chuck It Ultra Sling Dog Toy with Dart Assorted Colors - 31270 All new fetch format with universal sizing for small and large dogs alike Compact size makes it easy to store and carry Elastic band allows for adjustable range for smaller yards or open parks Includes Ultra Dart  Spin: Its helical offset encourages an erratic, spinning flight pattern Try out all 5 compatibles, sold separately: Speed Dart, Spin Dart, Float Dart, Rugged Dart & Ultra Wing