The Double Flared Eyelet is made of premium processed and lightweight acrylic. Both side bended rims ensure a perfect hold in the stretched lobe. Therefore no rubber ring is needed to fix the Eyelet.
The Acrylic Double Flared Eyelets can not be sterilised in an autoclave, but their skin friendliness makes them harmless, even for allergic persons.
 
As beginner or pro in the matter of soft stretching, this eyelet definitely is the right choice.