Aircraft style gas caps allow perfectly flush installation for that undisturbed, low profile look if motorcycle is viewed from the side. The lock ring can be screwed to the tank surface with the supplied screws and lock nuts or by means of mounting ring kits which replace the nuts. These have to be ordered separately. Using the weld-in bungs you achieve the same look as with our ”Quick-Cam” tanks. Aero cas caps are of non-vented style. For proper tank ventilation a separate valve is required.