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 ...