DGK Digital Kolor Pro 16:9 Chart - Set of 2 Large Color Calibration - Video Chip Charts / 18% Gray White Balance Cards Set of 2 large 16:9 Color Reference Charts (14"x8") with 18% Grey Precision 18%-Grey reference for white balance plus 18 Color patches for superior digital color correction Double-sided construction, archival quality acid-free paper Works with Picasa, Aperture, Photoshop Lightroom, Photoshop Elements and Photoshop CS4 Video Chip Chart - Also has NTSC color bars and 16:9, 4:3. 1:1 framing aperture reference on reverse side