Features: Our potty training bells for puppies are made quality wooden beads and metal bells, safe and reliable, strong and sturdy enough, not easy to break or deform, so you can use them with confidence for a long time. With an attractive and delicate design, the adjustable dog bell is an ideal gift which you can send to your family and friends who have dogs, and they will be happy and delighted when they receive it. Specifications: Material: wood, metal Color: white, gray and burly wood Size: 35.43 inch Package includes: 3 x Dog doorbells Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.