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RFID blocking pvc sleeve is made of pvc and aluminium foil. As we all know aluminium foil layer can stop electromagnetic wave and avoid any people scanning our RFID card without any authorization to make loss . It is simple rfid blocking products and easy to take and competitive price . You can customize your logo print , numbering or special package with us .Normally will work for 13.56mhz contact-less smart card blocking application.