This image is of a toroidal inductor with 2 leads showing. The tape secures the leads to the coil so that the leads do not move. The 3 toroidal cores have been secured together and have been wound with magnet wire. The completed assembly is dipped in air dry vanish and then used in a medical application.
Here we see a bin of toroidal inductors that have been wound and have leads attached to the winding. These leads will make the electrical circuit connection.
The same inductors as in the previous image are now placed in a potting cup and are ready for encapsulation, when the cup is filled with epoxy.