Single. The CODELOCKS RFID Smart Stickers are used to provide access solutions to the CODELOCKS range of RFID locks. They can be stuck to many items including mobile phones and identity cards to provide a convenient alternative to cards and key fobs.. Sold in singles. For use with Codelocks & Kitlock RFID products. 1 inch diameter. MIFARE Classic 13.56MHz 14443-3 Type A