KnuckleHeads from GreenLink are molded reinforced-nylon supports that keep equipment elevated off the roof’s surface, preventing low points that can lead to ponding, ice formation and leaks. They are height adjustable.  Each can support up to 600 pounds. Four support designs are available:  strut, paver, light pipe and heavy pipe. For more information, visit greenlinkengineering.com or Booth #208.