Sadly, I ordered this well ahead of my husband's hipnreplacement but didn't test it first. We got home from the hospital, filled up the Breg ice machine only to discover it didn't work. I had a pad from knee surgery that works fin3 when attached to my machine sonitsbdefiniyely this pad that is defective. I emailed the company but it's a Sunday and we need the pad now so I'm not sure what my recourse will be.