Stainless Steel Rings

Pure Stainless Steel. Smallest is 2 inches, largest is 3 1/2 inches. 

One photo 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.