Dog prong collar - 50145 (3.99mm) (1/6 inch) Steel-Antique Copper plated ( Made in Germany ) : Prong Collars, Pinch Collars, Dog Training Collars, Curogan Collars, Chain Dog Collars, Fur Saver Collars, Choke Dog Collars, Herm Sprenger Collars, Dog Muzzles