This is a simple stand for an external tank that I use for my Kolibri Turbine RC airplanes. The tank is attached to the spillover line to avoid any spillovers while fueling and to provide external fuel for turbine start-up and full throttle test so the main tank remains 100% full until the external tank is taken away last thing before take off. The stand just provide a nice way to keep the external tank in a stable position.