Secrid Card Protector Collection Aluminium Card Holder With A Brushed Silver Finish. The Cardprotector is the heart of our collection and our most minimal wallet. The patented mechanism allows you to slide out your cards with one simple motion, ready for immediate use. The aluminium casing protects from bending, breaking and unwanted wireless communication. Holds 4 embossed or 6 flat cards Size and weight 63 x 102 x 8 mm 48 g Footprint The cradle to gate production of this wallet, packaging included, has the following footprint in terms of greenhouse gas emissions, water usage and energy usage.