Leather Martingale Dog Collar, Choker, 16"x1" (20.5" fully extended), Black, Leather (Rio) with Stainless Steel. Read Description for correct sizing Prevents most dogs pulling and tugging; a great collar for loose leash walking and training Loop design prevents the collar from slipping off your dog's head Functions as a more gentle and humane form of correction/training than a choke collar 100% Genuine harness and cowhide leather Prevents most dogs pulling and tugging; a great collar for loose leash walking and training Loop design prevents the collar from slipping off your dog's head Functions as a more gentle and humane form of correction/training than a choke collar 100% Genuine harness and cowhide leather