Pure Stainless Steel. Insertable length 80mm, diameter varies from 3-7mm. 

Comes with 2 rings, choose which will fit best.  (25mm and 30mm) The ring on this sound is not fixed in place. It will move to any point between the balls.

One picture has complete measurements, one is next to standard #2 pen for size perspective.

Plugs are solid, sounds are hollow. NO electrical connection present on this model, but can be easily added with items from our Do-It-Yourself section. A small pad or gator clip is the simplest.