Highly conductive, these are adjustable to allow tightening to your personal preference.  Just push on the button of the cord lock, tighten and release.  The inner diameter is 1.75mm so any TENS pin will fit snugly.  

The tubing is available in 4mm, 6mm or 8mm diameter.  These are genius in that they can be used either as unipolar or bipolar. For bipolar, plug one banana of your leadwire into each side. For unipolar, use one of our Y cables. 

Be sure to use water-based lubricant such as Spectragel to keep the sensations smooth and avoid hot spots. Never use any lube with silicone of any kind- it weakens and degrades the rubber.

Be sure to avoid stretching unnecessarily, it will break the conductive carbon fibers and reduce conductivity.  

Order singles, pairs, or a variety with 4 & 6 mm or 6 & 8mm.