DIY fun: Sublimation business cards are suitable for laser engraving, to create their own exclusive business card, carved logo will be very enjoyable. Safe to use: The metal business card is durable, solid, with smooth surface, and will not hurt your hands. Specification: Color: black Size: 3.4 x 2.12 inches (L x W), Thickness: 0.008 inches Quantity: 100 pieces Material: aluminium alloy Warm Notice: 1.Please allow slight size errors due to manual measurement. 2.Because of lighting and screen settings, please note there might be slight color difference between the pictures and the actual product.