compatible with AirtagThe airtag holder is professional designed for Apple airtags 2021 It holds the air tag snugly and tightly attached to the 08-12inch pet collars preventing your air tags from dropping and scratch o ShakingTraditional holder is hanging down the collar shaking seriously when your pet is running or jumping which make your pet uncomfortable This holder is designed closely attached to pet collar of 08-12inch let your pet feel more easy Various colors and QuantitiesThere are 14 colors (including 4 glow colors) and 1 2 or 4 count packs suitable for different collars you already have remium MaterialThe holder is made of high quality silicone durable elastic eco-friendly waterproof easy to clean scratch-resistant no signal blocking and light weight Widely UsedThis airtag holder is closed loop design not only used for pet collars but also childAs school bag elderAs belt handbags backpack bags etc