DGK Color Tools 8" x 10" 18% Gray Card is an accurate white balance card / 18% gray card for film and digital photography and video. Spectrophotometer verified 18% reflectance. The 8" x 10" card is made from extra-thick cardboard stock paper. The size of this card makes it super easy to fill the viewfinder for white balance shots. Includes easy to follow instructions. Cards are not water resistant. Shipped in protective and reusable poly bag. Designed in Boston, Massachusetts and made in USA.