We found a simple Do It Yourself Single-PoleTri-Ring electrode and it includes a conductive silicone cock right too !!

The problem with metal, stainless and fixed rubber Tri-Rings has always been getting the right size for the cock, balls and the area around the cock and balls.  They usually come in sizes that do not always come in the right diameters to meet your personal fit, not to mention the challenge placing everything inside the rings.  With this kit, you place each ring around the area you wish to use it on, mark it and cut it off for a personal fit. Push the brass Snap connectors into the end, connect it and then go to the cock ring and do the same thing.  We recommend that  you begin with the largest ring that goes around the base and behind the balls and then go from there.  You can uncouple the rings for removal once you are done with them and re-connect them when you are ready to use them.  NOTE: Make sure that  you do not cut too much off of each ring!!  You can always cut more off, but not put it back.  :(

The tubing is 8x4mm (approx 3/8" x 1/8").  This size makes for a good fit and provides plenty of surface area for current to travel around.  Each brass connector has a Snap connector and comes with 2 leads; one with a single female snap and another with one 2.5mm audio lead with three female connectors.  If you do not have a power box that uses a 2.5mm audio lead, you can connect this set of rings using TENS to Snap adapters, an adapter cable with either a female TENS or Banana connection, or a TENS to 2.5mm female audio adapter cable.  The PES low profile squeeze type lead connections should work with these too.  Only one connection should be all that is neeed for the tri-ring, as the conductive silicone tubing touches when all together.  The three brass connectors are there for connectins to all three in the event you want to be sure they are all "hot:.

Clean up is simple, just wash it with warm water and antibacterial soap.  NOTE: Never pull or stretch the tubing to dry it.  Pulling tends to separate the black carbon powder from the silicone and over time will lessen its conductibility.  Only use water based lube, should you want to heighten the skin to tubing conductivity.  Silicone and petroleum based lubes and gels will destroy the conductivity and petroleum will eat silicone.

Your kit will have the following parts:

1) Three machined brass connectors with Snap heads 

2) Three 8" pieces of 8x4mm conductive tubing put together as shown above.

3) One Cock Ring with brass snap connector.

4) 1 - 2.5mm audio lead with a female snap connector. 

5) 1 - 2.5mm audio lead with three female snap connectors.

The illustrations below show the unassembled kit and what it looks like finished.