Prevent identity theft, phishing and other electronic threats when you carry your important chip cards in these RFID blocking holder sleeves. Made of aluminum alloy, this 3.74″ x 2.36″ x 0.35″ holder prevents the remote scanning of chips by skimmers and other theft enabling devices. Shop and travel with greater confidence! Available in assorted colors. Add your school, sports team, organizational or company logo or message to customize. Orders greater than 5000 units eligible for sea shipping.