4mm chrome plated, round, narrow link choke chain. Manufactured in Germany and stamped "HS Germany" to ensure authenticity. Herm Sprenger has long been the gold standard for corrective and other metal collars.
A properly fitted choke chain is important for you and your dog during trianing. Please note that a choke chain is measured from end to end, including the end rings and needs to be large enough to fit over your dog's head.