Every crime scene unit should have a set of these multi-purpose SuperSticks for blood spatter analysis and general photographic needs. Bold black numbers on a bright yellow background provide excellent contrast for both black and white and color photography. Two horizontal sticks numbered left to right and right to left and two vertical sticks numbered top to bottom and bottom to top. Constructed of flexible PVC material for easy cleaning. Provided in sets of four 48" SuperSticks in a durable plastic carrying case.