Could be modified many times. Lightweight and portable to carry. Convenient to use. Replacement card of your old one. UID cards have 16 Sectors and 4 Blocks each Sector. Organized in 16 sector with 4 blocks of 16 bytes each(one block include 16 bytes) Just program this UID to the UID of lost card then you have a new Exactly the same card.
MiFare 13.56MHz Classic Blank RFID Card