# Mifare Classic 1K FUID NFC RFID Tags - Filament Id

25mm RFID sticker: Write-once UID blocks rewriting. Tamper-resistant, 3M adhesive. Works with Mifare systems.

- **Seller:** [Randware](https://www.lectronz.com/stores/randware), Phoenix, Arizona, United States
- **Price:** $2.50 (USD, before shipping and taxes)
- **Availability:** In stock
- **Categories:** Prototyping, Technology, Components
- **Product page:** https://www.lectronz.com/products/mifare-classic-1k-fuid-nfc-rfid-tags-filament-id

## Links

- [Documentation](https://d3s5r33r268y59.cloudfront.net/datasheets/37411/2025-01-30-19-19-56/CHIP-MAIFER.pdf)

## Images

![Mifare Classic 1K FUID NFC RFID Tags - Filament Id](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6Mzc2MDgsInB1ciI6ImJsb2JfaWQifX0=--eab92c566a08a3a4b431889ea91dc42f6c109f93/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJwbmciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--605f1da017bcbb03ce31845cd0e81d97e3b3c574/2025-09-18T00-3A34-3A45.086Z-Mifare-20Classic-2020mm-20backing.png)
![Mifare Classic 1K FUID NFC RFID Tags - Filament Id](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6Mzc2MDksInB1ciI6ImJsb2JfaWQifX0=--9d9c4d88f9bed6a59f847615a6e36982175e271f/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJwbmciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--605f1da017bcbb03ce31845cd0e81d97e3b3c574/2025-09-18T00-3A34-3A45.086Z-Mifare-20Classic-2020mm.png)
![Mifare Classic 1K FUID NFC RFID Tags - Filament Id](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6Mzc2MTAsInB1ciI6ImJsb2JfaWQifX0=--63654211f101a19e6dfc9563dea66838c30c94d7/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGVnIiwicmVzaXplX3RvX2xpbWl0IjpbOTYwLDY0MF0sInNhdmVyIjp7InN0cmlwIjp0cnVlfX0sInB1ciI6InZhcmlhdGlvbiJ9fQ==--4e27bac8cdfb621fb828f6a3a5982fe1a423b516/2025-01-30T19_35_04.711Z-IMG_4636..jpeg)
![Mifare Classic 1K FUID NFC RFID Tags - Filament Id](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6Mzc2MTEsInB1ciI6ImJsb2JfaWQifX0=--a09ee6ad0f2c966405adf0f470b2a623896cea43/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGVnIiwicmVzaXplX3RvX2xpbWl0IjpbOTYwLDY0MF0sInNhdmVyIjp7InN0cmlwIjp0cnVlfX0sInB1ciI6InZhcmlhdGlvbiJ9fQ==--4e27bac8cdfb621fb828f6a3a5982fe1a423b516/2025-01-30T19_35_04.711Z-IMG_4637..jpeg)

## Description

**What is it?**

A 25mm 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 25mm 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.