Silver RFID Blocking Sleeve Holder Credit ID Card Secure Protector Pack of 10 (Type 1) metal shielding aluminum material ,RFID Blocking Sleeve Holder Aluminum ferrules can avoid bank card, the second generation ID card, information card, social security card and other magnetic disappear or information leakage. Protect yourself from payment fraud and electronic pick-pocketing and other difficulties Anti-static, anti-RF energy,lightweight and flexible. 10 pcs in one package Difference of the 2 items is that The surface of Type 1 is empty while the surface of Type 2 is printed on English characters