[Durable and safe material] The dog bells are made of sturdy nylon material that is strong, durable and chew resistant. The strap is environmentally friendly, safe, non-toxic and odorless and will not cause any harm to your pet. And the bell is made of a mixture of metals which is loud and crisp, it can be heard through the door and the wall. [Adjustable Length] The length of the puppy doorbells can be easily adjusted according to the size of your animal. From length 33’ to 43’. [Effective Training Device] With the simple training guide, dog bells are an easier and better way for your dog to communicate ! Teach the animal to ring a bell to get out or go to the bathroom instead of scratching the door and barking for your attention. Use a softer way to create intimacy between you and your pet. [Clear and Loud Hard Bell] The bells are made of high quality stainless steel, the sound is loud and clear, and it doesn’t It’s not easy to be bitten by pets. Extra loud sound will attract your
