1. size: 60 pieces blank NTAG215 NFC coin cards round 25 mm (1 inch), mini size allows for convenient storage. Quantity Just the right amount for fun and needs; a choice as a small gift for friends or family. 2. Chip: NTAG215 chip with 540 bytes of memory, password protected authentication, scan strength, and easy programming. The NTAG215 chip features read/write lock functionality, allowing for repeated editing or read only mode. Once set to read only, tags cannot be edited or reset. Lifespan: 10 years, 100,000 erase/rewrite cycles (Note: Amiibo can only be written once—do not erase or rewrite repeatedly). 3. quality NFC tag stickers: Made of PET material, our NFC tags have a smooth surface, are wear resistant, stable, feature strong adhesive strength, and are waterproof, durable, and resistant to damage. 4. Simple and easy to use: Our NFC tag stickers are self adhesive and can be easily attached to books, tables, walls, and most surfaces. No batteries or manual pairing required—just hold your phone near the tag to transfer data instantly.