Zeus Uni Polar Electrosex Cock Rings. Conductive silicone makes these unipolar cock rings an exciting addition to any electro toolbox. Simply place the rings over your rod and connect them to your Zeus Powerbox. Sold separately. Once the rings are on and hooked up, select your intensity level. A tantalizing current will flow from the rings to the skin, exciting the nerves along the way! This set includes one 1.5 inch silicone ring, one 1.9 inch silicone ring, and one lead wire. Compatible with all Zeus Powerboxes and handheld systems, sold separately. The silicone material is non-porous, allergy safe, and easy to clean. Measurements: small ring 1.5 inches in diameter. Large ring 1.9 inches in diameter. Material Silicone. Color Blue.