2Pcs/Pack 4 in 1 Replacement Electrode Lead Wires Connect Cables DC Head 2.35mm Pin 2mm for TENS 7000 & TENS Machines

I bought the same cords a couple of years ago. Even with heavy use they still work well and are still flexible. I'm buy an extra pair just in case and because the old ones are getting a little discolored. I don't know what is inside them but it is not stiff copper wire unlike some black ones I purchased from Amazon previously. You can kink and knot them repeatedly and once unknotted not a kink remains there are no signs of metal fatigue. Amazing.

This is my 2nd time to purchase this type of cords for EMS.. easy and better to use bcoz of its 4 male pins. Only the wires are easily damage coz it’s just thin.

Nice seller

These should have been available a very long time ago...they would have helped so many people.

As long as the batteries in your TENS unit are in good condition these leads allow you to use more patches thus spreading the effect.

I feel like the sizing of the connecter is off. Sometimes they hold great but once in awhile they just fall off and it ends up zapping you with no notice.

Good conductivity.good connectors too.item Works great.I would buy this item again .I recommended this item.im using it for my personal tems unit.i find thesr leads last longer and are more durable than most in my opinion.

Connector loose and connections unmarked for polarity.