Description; General description; This plastic metric/English scale is printed with a highly visible, glow-in-the-dark pink phosphorescent ink. Under UV light the ruler graduations glow visibly and help to calculate nucleic acid mobility. The ruler is marked 0 to 15cm in millimeter increment, along one edge and 0" to 6" in 1/16" increments on the other edge. High visibility, glow-in-the-dark scale • Ideal for viewing fluorescent images and fluorescent photography