Pure Stainless Steel. Insertable length 130mm, diameter varies from 7-9mm. 

Comes with 2 rings, choose which will fit best.  (25mm and 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 socialstim.com.