Cardholder made from recycled aluminum. Capacity for up to 10 cards, with an ingenious sliding mechanism for easy access to the cards. RFID (Radio Frequency Identification) security technology that keeps your identity transmission devices secure. RFID and Recycled Aluminum labels.Recycled aluminum is a material with almost infinite recycling possibilities, without losing its original properties and consuming less energy in the process.GRS certification (Global Recycled Standard), which guarantees the recycled origin of the material used to manufacture the product.