The tank adapter contains two through filler necks for connecting the fuel line to the tank, or two separate tanks can be filled through it.
Insert the adapter from the outside of the fuselage (or behind a flap) into a prepared opening of Ø 16 mm. From the inside, screw the locking ring onto the thread and then glue it to the adapter and the fuselage.
On the inside of the lid there are two covers with which the filler necks are closed; outer diameter of the lid 23 mm.