Mifare Magic Card MTools Tec Group provide all kinds of Mifare Magic Cards which has changeable UID and backdoor command support. The Mifare Magic Cards contain 4 Byes UID Mifare Classic 1K, 7 Byes UID Mifare Classic 1K, 7 Byes UID Mifare Classic 4K, 4 Byes UID Mifare Classic 4K, UID Changeable Mifare Ultralight Card and UID Changeable Mifare DESFire Compatible Card.