The Kantech P30DMG ioProx Proximity cards with magnetic stripe provide enhanced security through their dual XSF (Kantech Extended Secure Format) and W26 encoded formats. With over one billion possible code combinations, these cards prevent duplication and can be read up to 73cm away depending on the reader. Available in packs of 50, these cards also feature a magnetic stripe on the back surface (not encoded).Dual XSF and W26 encoded formatsOver one billion code combinations prevent duplicationMagnetic stripe on back surface (not encoded)