DGK Color Tools DKC-Pro 5" x 7" Set of 2 White Balance and Color Calibration Charts with 12% and 18% Gray - Pro Quality - Includes Frame Stand and User Guide The DGK Color Tools DKC-Pro Set of 2 Cards: This is the pro version of our popular DKK Card, supplied in a 2-pack with frame stand for hands-free tabletop use. The DKC-Pro Multifunction