Size Details: The training leash is about 1.5cm wide and the one-sided rope is 30-50cm long, suitable for most dogs; it can also be adjusted to the length of the rope you need; use it with your dog in the most comfortable way possible. If you buy two dogs of different sizes, choose according to the size of the larger dog. Reliable Material: This anti-tangle training leash is made of high quality nylon, safe and durable, and will not break easily from pulling or chewing, and can be used for a long time. Will not rot, mold, and easy to clean. Please wash it after letting it dry before use. Double Head Adjustment Design: The length of both sides of this leash coupler is adjustable; the length of both sides can be adjusted to set the distance you want; just attach the leash to this divider and you can control both sides safely. Prevent two dogs from following conflicting instructions due to confusion. You can easily walk two dogs together when you go out. Strong and Safe: This double dog