NubianProx Credentials to GE CASI-RUSCO Access Control System. Compatible to Casi-Rusco CX-ISO Card 40bit PVC Cards. Casi-Rusco 40bit Clamshell card, Casi-Rusco ID Key fobs, Casi-Rusco proximity Tags 40bit C10106 Format. Proximity cards are available in a wide range of styles, so you can pick the card type that will work best for your organization: Standard PVC cards ; Composite cards; Printable PVC or composite cards; Clamshell cards; Cards with magnetic stripes; Key fobs; Adhesive tags; Wristbands