Malayan Products colored aluminum sheet blanks, industry standard business card size, credit card thickness perfect for fiber laser engraving machines as well as many other engraving methods. Please select the desired color and Amount. Instructions: - Cards arrive blank and ready for engraving on both sides - Thickness may vary slightly depending on measuring instrument this cards are approximately 0.45MM and have similar strength comparable to an aluminum credit card - color may vary slightly due to screen display settings - May require adjustment of laser focus and power settings for correct engraving - Cards are made of aluminum and are not painted, they undergo a specific anodization electroplating process for aluminum to bind the cards color - Please be sure all safety measures have been accounted for with lasering, We hope you enjoy our engravable products and have success in your projects!