High Frequence RFID Blank Cards With MF 1K Chip is made by MF1 IC S50 chip, usually referred to as S50 card or MF 1K. Could provide white card, printing card, paper stickers labels, key fobs, Token Cards, and a variety of thin card and thick card. Main applications: access control, identification, logistics, industrial automation, all kinds of membership cards, such as Shoufan, subway, bus token cards, clubs and other electronic consumer, and so on.