Conventional NFC Tags don’t work when applied to metal surfaces. Because NFC tags work by electromagnetic induction, metal can easily interfere with their operation.
On-metal or Anti-metal NFC Tags are specially manufactured with a protective layer made of ferrite, so that they can work also if stacked directly to a metal surface.
COLOR : BLACK 
NFC Tag (Sticker) Features
- Chip: NTAG215 (compatible with all NFC enabled smart phones)
 - Size: round with diameter 30mm
 - Material: pvc
 - Color: Black
 - Protocol: ISO/IEC 14443A
 - Function: read and write
 - Reading distance: 20 mm
 - Designed for use on metal surfaces
 
Applications OF NFC
- Payments (banking)
 - Transportation (Ticket)
 - Access control (hotels, companies, …)
 - Events (exhibits, important events, invitation cards)
 - Business cards
 - Hospitals (Patients data)
 - Farms (Animal and planets identification)
 - Show Rooms (items data)
 - Shipping (product shipping history and specifications).
 
NFC TAG (Sticker) read/write tutorial using NFC module