The Walk 'n Train! Head Halter Display contains 12 Head Halters, 2 of each size (0-5). Coastal's Walk 'n Train! Head Halter features pressure and release action that control the head so the body will follow. A safety strap is included for added security. This specially engineered training tool teaches your dog to walk right, making the experience enjoyable for you and your dog. "Coastal reserves the right to ship kits incomplete with no substitutions."