The RFID blocking card sleeves mainly for protecting cards from scratching and damaged. Widely used on credit cards, ID cards, ATM cards, passports, driver Identification card and other RFID-enabled contactless Cards.Specification:Color: WhiteMaterial: Aluminum, PlasticSize: 92 x 62 x 0.3mm /3.62 x 2.44 x 0.012 inch (L x W x T)Packing List: 10Pcs x RFID Cards SleevesAdvantage:Material containing aluminum, with good rust resistance.Ultra-thin design, easy to carry and storage.Cards signal would not lost when you using it.Instruction:Put the card into the card sleeve.NOTE: Please check the size of your card.