Made of a light and durable aluminum alloy. The anodized sections are imprinted with weather resistant and corrosion resistant inks. Tight tolerances on extruded aluminum sections allow for smooth extension and prevent unnecessary clattering and sloppiness. Equipped with reliable and wear-resistant polycarbonate buttons that lock each section. Easy-to-read graduations and a special measuring scale on the backside permit users to read height at eye level Tools and Hardware