Pure Stainless Steel. Insertable length is 130mm, diameter varies from 12mm to 30mm.  VERY large. 

Also comes in a 3 Ball Anal Hook.

One picture has complete measurements and 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. For how-to ideas and instructions, check out the forums at smartstim.com.