If you are wanting a nice flexible 6mm insert that is also bi-polar, take a look at this interesting insert.  This insert does have a 2.5mm input jack that works great with your Coyote Power box or any other unit that has a 2.5mm female jack on the power box.  However, if you have an E-Stim Systems 2B or any other of their units or other brands that use a 3.5mm male input jack, you can purchase a 3.5mm male to 2.5mm adapter in our Wiring and Adapters section of the web site.

NOTE: Most of the sales of this insert have been the 10 inch size.  Since this is a bi-polar insert, you must make sure that the bottom and the top electrode are touching the skin.  Meaning, the entire insert must be inserted so that the top electrode touches the tip of the penis or inside the urethral canal.