Packaging: 50 NFC cards, diameter 25mm/1 inch, each NFC card comes with a self-adhesive back for easy attachment. High quality material: The NFC cards are made of waterproof plastic with a smooth, writable . Compatibility: Whether you use them with for TagMo or your NFC-enabled phone, these cards are guaranteed to work smoothly. The cards are also rewritable, meaning you can use them again and again to store different data and information ( can only be once and cannot be reused). The NFC blank tag uses the chip with 504 bytes memory and can be read and written over 100, 000 times. Please note that it is not suitable for use in highly magnetic environments. Other applications: You can use NFC stickers to create Amibo cards. You can get any weapon, pet, mount, or fashion item you want. Quickly share your social messages, music, establish a WiFi connection, create a smart home and much more! size: 25mm Material: plastic colour: white Package Contents: 50 x NFC cards Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.