ABS Anti-metal Coin Tag has a 3M adhesive layer that you can attach to the metal objects. So you can also call it ABS anti-metal sticker.

Embedded with HF chips or UHF chips, it has strong RF performance. As for which chip to use, it depends on your application.

Xinyetong ABS Anti-metal Coin Tags come in many sizes, such as 20mm, 27mm, 50mm, etc.
Besides, you can tell us what sizes or chips you want, we can customize it for you.