Anti-metal 13.56MHz Hard PVC NFC Tag is made of hard pvc or pet material with customized printing on top with optional adhesive backside . 18mm ,25mm ,30mm or customized size ,shape are available .With hard pvc or pet material lamination and without any space can make them work in harsh out-door or water environment , between hard nfc tag and adhesive we put anti-metal(ferrite) layer material to make our nfc tags can work on metal environment. It can be optional with 13.56MHz ISO 14443A/B and ISO 15693 rfid chips .