I have purchased these electrodes many times thinking they are the only ones I could use with the Chattanooga Tens unit. But I kept ordering them because I need them for my back and knee problems, but unfortunately they kept breaking. Sometimes the wire comes loose from the electrodes in less than 3 weeks of use and there is no way to get it back so I had to throw out a lot of them. see photos. I ordered another brand and had no problems with it, also Durastick doesn't stick for too long either a month or 3 weeks at most. I think the only thing that's fair is that the manufacturer will refund any pad orders I've placed through Revain
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