100pcs UID RFID Tag Keyfob for 1k s50 13.56MHz Writable Block 0 HF ISO14443A Used to Copy Cards

13.56MHz Writable mif 0 zero HF ISO14443A Used to Copy Cards

This card works the same as the normal IC cards, for Mif 1K S50 standard. Only the Sector 0 Block Zero which is known as the Serial Number/Manufacturers Block(Chip UID) could be programmed to any UID you want.

If you choose Mixed color, you will get: 20 blue, 20 gray, 20 black, 20 red, and 20 yellow.