The fuel outlet fitting has a large aperture of 3mm and double O-rings to ensure the sealing. Three locking structures to prevent it from falling off during operation and ensure safety.
The fuel inlet fitting is also designed with the same internal locking structures. The inlet fitting is self-locked normally and will only be opened once the outlet fitting is inserted. The connection can be fixed by slightly rotating about 60° after the inserting. After refueling, re-rotate 60° to disconnect, and the inlet fitting will be self-lock again.