1.epoxy material.
2. number printing.
3. EM4100, EM4102, TK4100, T5567, Mifare 1k, ICODE SLI etc

high heel key chain/ key chains/ high heel shoe keychain/ key-finder/ key holder/ balance extreme/ led key chain/ keychain/ fox tail keychain/ key chain/keyring/silicone key/metal keyring/promotional gift/fox tail keychain/access control key tag/water proof/laser print keytag/inner code/ trolley coin/ kid robot/ leather key holder/ high heel key chain

Customization option
      Silk-Screen Printing
      Jet Printing Serial Number.
      Laser Mark Serial Number

Physical Specification 

Commonly used ICs:

---12KHz LF contactless ICs .
EM marine  EM4100/EM4102  (64bit read only).
Taiwan        TK4100  (64bit,read only)
Atmel          T5557/T5567  (330bit,R/W).

---13.56MHz HF contactless ICs
NXP              Mifare Std 1k   (ISO14443A,1k byte R/W)
NXP               Mifare Std 4k  (ISO14443A,4k byte R/W)
NXP               Mifare ultralight (ISO 14443A,512bit R/W)
FM                 FM11RF08 (ISO14443A,1k byte R/W)
NXP                ICODE SLI (ISO15693,1k bit R/W)

If you need other chip,please contact us.