Pure Stainless Steel. Insertable length 70mm, diameter tapers from 5mm up to 7mm and back to 5mm.

Comes with 2 rings, choose which will fit best.  (25mm or 30mm)

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

 NO electrical connection present, but can be easily added with items from our Do-It-Yourself section. A small pad or gator clip is the simplest. For other how-to ideas and instructions, check out the forums at smartstim.com.