[Compatibility] The bracket protector is specially designed for Apple Air Tag 2021, so you can easily hang it on the 0.8-1.2 inch pet collar/pet ring bracket to keep the air tag consistent with the pet carrier to avoid dropping Drop and unnecessary dragging. [Pet comfort] If the pet collar hangs or shakes, your pet will feel uncomfortable. But this pet can solve all the problems and make your pet feel more relaxed when running, without leaving any space for your dog to chew [ material] It is made of environmentally friendly, flexible and soft liquid silicone, which is very easy to clean, anti-fingerprint, anti-scratch, and anti-drop. [Easy to use] This Holder leather case has an independent design, which is easy to use under cat/dog collars and pet ring brackets. It can also keep your air tag closed to avoid accidental slipping of the case. [Use occasions] This silicone protective cover is designed with a two-way opening. You can connect it to your backpack/bag, elderly belt, children's schoolbag, dog/cat collar or pet ring bracket, etc. Easily track anything you want. size:37mm Material:Silica gel colour:Blue+ Black Package Contents: 2 x Protective Case Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.