Wanna something special to your customersThis RFID Protection card holder could be a good choice.This card holder is made of aluminum foil,which can protect your ID or credit card from electromagnetic effect,so that you can avoid being stolen by their electromagnetic device.Customization is also available for this item,you can imprint your own brand,logo on it to make it as a special gift to your custmers.Great for a lot of occasion. More information, please send your detailed request for quotation. Made from plastic material, measuring 3.66*2.48 inches, this custom multi-colored portable rfid protection card sleeve with logo.