Aluminum card holder Stored unused. The image contains an explanation of the C-secure XL card protector. This product is made of aluminum and not only prevents damage to plastic cards but also blocks unauthorized data reading from RFID/NFC cards. Key features are as follows: Made of aluminum, preventing cards from bending or breaking. Prevents reading (skimming) of RFID/NFC cards by malicious individuals. Compatible with ISO/IEC 7810 ID-1 standard ID cards, cash cards, credit cards, etc. Holds up to 12 non-embossed cards or a minimum of 8 embossed cards. ISO/IEC 7810 ID-1 size standard: 53.78mm tall, 85.50mm wide, 0.75mm thick ± 0.04mm. Function: The side slider allows cards to slide out, enabling safe and easy use and storage of RFID-NFC cards. Note: Designed for standard credit card-sized plastic cards and is not suitable for thick paper business cards. Color...Black系 (Black-based)