ULTRA-PLUS Training Prong Collar with Center-Plate 2 rings - Steel chrome-plated 3.00 mm - short version 20 (50cm) : Prong Collars, Pinch Collars, Dog Training Collars, Curogan Collars, Chain Dog Collars, Fur Saver Collars, Choke Dog Collars, Herm Sprenger Collars, Dog Muzzles