Every crime scene unit should have a set of these multi-purpose Super Sticks 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 one vertical stick numbered top to bottom and bottom to top. Constructed of flexible PVC material for easy cleaning. Comes in set of four 48" Super Sticks in a durable vinyl carrying case with a threaded cap for your protection and convenience.