Two 1000 gallon propane tanks for a switch heater installation. There is a control box next to the tanks for the fuel supply. This version does not have the electrical control panel for the switch heater control in the asset. An electrical control panel should also be placed near the switch heater. The propane tanks are supported on ties with concrete supports on each end. Place tanks at least 5m from track and at least 15m from switch heater.