Go to great lengths during your campaign with the help of our civil engineering 4" triangular scale ruler. Featuring white high impact styrene with black engraved graduations, it has 10ths, 20ths 30ths, 40ths and 50ths and a color coded center stripe. Each ruler is inserted in a black backed-clear front, vinyl pouch with strapped flap. Ideal for pipe and sewer contractors, this item makes a great giveaway. Start promoting business and services today!