(5) Five – 12″ x 24″ sheets per pack - Matte Black Exterior / White Core - 1/16″ Material Thickness - No Backing Industry Standard for Interior and Exterior use, Mechanical or Laser Engraving Gravoply™ Ultra Black and White Plastic Engraving Material – 12″ x 24″ Sheet Pack For indoor or outdoor use, mechanical or laser engraving, Gravoply™ Ultra is the ultimate material for any engraving need. Reduce inventory with one material for rotary, laser, indoor, and outdoor needs. Gravoply™ Ultra is ideal for many applications, including signage, personalization, industrial, and more. A high-end look, productivity, precision, and durability are signature features of this engraving material. Premium laser and rotary engraving material 2-ply material Excellent for photo lasering