Everything you need to get your crafting off the ground with your Glowforge Aura or Glowforge Spark. Contains 19 pieces of nearly every type of Proofgrade ™, including acrylic, hardwood, plywood, eco iron-on vinyl alternative, and leather – all sized at or under 12"x12" to be compatible with your Craft Laser ™. Note: Pack contents will vary and may not match the exact materials picture.