Quantity 10 RFID Key Tags.

Operation Frequency: 125KHz
Detecting distance: 8-20cm
Size: 40mm high x 32mm wide x 4mm thick.
Weight: 5 g each
Chip type: TK4100, EM4100.

These work well with any standard 125Khz RFID Reader,
Each has unique ID printed on the Tag.

I also have RFID Lock System Controllers, Magnetic Locks and RFID Cards available.