Our HID 1431 Flexsmart proximity and Mifare cards are of superior quality and work on HID proximity card formats. These contactless cards also feature mutual authentication, data encryption, and a distinctive 32-bit serial number. They are sold in packs of 100 and are CR80 credit card-sized (86mm x 54mm) which makes them compatible with most ID card printers.Combines HID and Mifare smart card technologiesSupports all HID proximity card formatsFeatures mutual authentication, data encryption, and a unique 32-bit serial number