HIGH QUALITY - NFC Tagmo is made from superior PVC material.It is durable and can be used for a long time. The tags are non-toxic and eco-friendly. ECONOMICAL & ADHESIVE - The adhesive NTAG215 rounds cards come with 50 pieces smooth and sturdy coins for you to write.Each piece is 25mm(1 inch) with 504 byte capacity, cheaper with long life expectancy. UNIVERSAL FITNESS - NTAG215 NFC Tags Cards is compatible with all NFC enabled devices. EXTENDED APPLICATIONS - The NFC card have a wide range of applications , such as the device of DIY tags,authentication and business contact or payment. DURABLE &MULTIFUNCTIONS - These NFC Tags have functions of waterproof and dust-proof. It can be used outside places even near water without affect the whole functions. Warm notice:Some phones are unable to read the NFC sticker tags, please understand it clearly before making purchase.