This is a replacement frame for Rayban Aviator lenses (in case your original frame has been damaged). Filament (1.75mm) is used as pin for the hinge. You can use hot water or a heat gun (with caution) if you cannot insert the lenses. The same way you can modify the curve of the temples if you are not satisfied with the fitting.
For the best printing result it is advised to use PVA for support material. Otherwise, it is important to use the suggested settings below.