6STARHOBBY Heavy Duty Metal Dual Power Switch with Dual Fuel Dots for RC Airplane The max. diameter of fuel dot is 4.5mm, suggest using 2.5mm-4.25mm fuel line. Using 22AWG high torque twisted wire with strong anti-jamming capability, and receivers and other electronic devices can be prevented from interference signals. Two Switches: one for connecting and disconnecting the receiver circuit, another one for connecting and disconnecting the CDI circuit. Two plugs compatible with JR and FUTABA: One for connecting with receiver battery, another one for connecting with the CDI battery to supply power without opening the canopy. Integrated dual fuel dots, safe and reliable, easy to take apart and put back. Dual fuel dots with fuel filler can be used to fill oil in the fuel tank both for engine or smoke system without opening the canopy.