Used a few times and then stored. ● Dog Collar ● The chain tightens when the dog tries to run, which teaches them to walk slowly. ● Recommended for training. ● Reflective for safe night walks. ● Suitable dog breeds: Small dogs with a neck size of approximately 25-38cm (under 10kg) ● Materials: Nylon, polyester, iron. ※ Important Notes ● This product is for pets. ● Never use this product to tie up or tether your pet in a place where you cannot see them.