The PIA/GATF Register Test Grid is available in two sizes. The Register Test Grid contains a precisely ruled pattern of line and highlight tint patches (10%) imaged on dimensionally stable 7-mil (0.007-in.) polyester base. It detects misregister as slight as 0.001 in. (0.25 mm). *Includes one CD with both Macintosh and PC formats. 610x762 mm