What is it?

A 20mm RFID/NFC sticker with ultra-strong 3M adhesive. Its write-once UID locks your chosen ID permanently — no tools or software can overwrite it, defeating systems that corrupt tags by tampering.

What makes it special?

Standard tags fail when attackers try rewriting their UID. This sticker’s hardware blocks all post-set changes to block 0, keeping your ID intact even if cloned/copied.

• Tamper-resistant UID: Set once, locked forever (prevents rewriting).
• Fully compatible with Mifare Classic 1K systems and readers
• Premium 3M adhesive backing - sticks well to most surfaces
• Compact 20mm size fits almost anywhere
• Mifare Classic 1K compatible: Works with ACR122U, Proxmark, Android, most readers and 3d printers.

Pre-programmed option: Request a custom UID before shipping.

Great for:

• Access control systems
• Asset tracking
• NFC automation projects
• Any application where tag reliability is crucial
• 3D printer filament identification system

Technical details: Uses the Fudan F08 chip (FM11RF08), fully compatible with Mifare Classic 1K protocol (M1) and operating at 13.56MHz. Meets ISO14443-A standards. Note: Data blocks (outside UID) remain readable/writable.