125kHz T5577 RFID Coin tag with Adhesive Backing for Identity Key Tags That can be rewritten with a Diameter of 25mm Black NFC tag(8 PCS)

Additional Details from the Manufacturer

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More features

• Chip:T5577 (compatible with other universal 125kHz tags),Frequency: 125kHz
• Note: You canNOT add them to RFID locks directly. They are blank RFID tags, no data inside. You need to use a 125kHz RFID card writer to write card number into them to use. Round-coin-shape sticker, with adhesive back. You can stick it on other stuff (but not metal) if necessary.
• Writable & Rewritable. It can be erased and written 100,000 times. Suitable for making new and back-up tags.
• Size: 25mm Diameter, 1mm Thickness. Casing Material: Black PVC Plastic. Waterproof & Durable. Package includes 10 PCS.