06-813 CST/Berger 13-Foot Aluminum Grade Rod in Feet, Tenths Hundredths 06-813 CST/berger telescoping aluminum rods are made of a light and durable aluminum alloy. The anodized sections of 06-813 CST/berger telescoping aluminum rods are imprinted with special weather resistant and corrosion resistant inks. Tight tolerances on extruded aluminum sections of 06-813 CST/berger telescoping aluminum rods allow for smooth extension and prevent unnecessary clattering and slopiness. The sectional joints are injection molded from a durable lightweight impact-resistant plastic. 06-813 CST/berger telescoping aluminum rods are equipped with reliable and wear resistant polycarbonate buttons that lock each section. Easy to read graduations and a special measuring scale on the back side permit users to read height at eye level.