FORMAT: These wiegand proximity Cards are programmed to be compatible and similar to the Kantech Ioprox XSF 26 Bit eXtended Secure FormatCOMPATIBLE: These proximity credentials are configured to be compatible with Kantech ioProx card readers.APPEARANCE: 85mm X 54mm X 0.8mm white clamshell keyless entry cardsNUMBERING: Over 4 billion code possibilitiesENCODING: Dual Encoded to prevent card duplicationsSimilar to ioProx, P10SHL, P20DYE, P30DMG, P40KEY, P50TAGWorks with P225XSF ioProx, P325XSF ioProx, P600 ioProx, and P225KPXSF ioProxINFORMATION WE NEED FROM YOUFacility Code