Aiminto Braided Round Martingale Dog Collar, Training Collar with Slidable Stop Ring - Ideal for Medium/Large Dogs (M+(1/2") - 18" Long, Black)

EXTREME DURABLE — This collar is designed to last, and won't wear or tear easily. It was sustainable to train & control hyperactive dogs.. Slidable STOP RING — The slidable O-ring is hard to move to get it to the perfect size but that's necessary because then it won't easily move when you are using the collar.. Martingale Collar - This collar can be used as a martingale collar for correcting bad behaviors and obedience training. For more information on how to use it properly please refer to product video linked below or contact Aiminto customer service.. Three different thickness available. 1/4"", 1/3"" and 1/2"" for all breeds.. PICK THE BEST SIZE — Please measure your dog's neck and pick the best collar size according to dog's neck circumference.