Product review (5 stars): Works on Thermador cooktops, too!
Somehow I manage to lose one of the little rubber feet on my 5-burner Thermador gas cooktop (circa 1998) every couple of months. I've been purchasing spares via Sears for about $9 for a pack of just 4 feet, plus shipping. I decided to try these, because they looked exactly the same as the ones I've been using.

They're almost exactly the same, and I would buy these again in a heartbeat. The only difference is that the length of the stem that squishes up into the cast iron grate is about 1mm shorter than the original. But the diameter and ribbed pattern of the stem are identical to the originals. And at about 1/6th the cost (with Amazon Prime shipping), I no longer resent replacing little rubber feet.

For those of you with Electrolux cooktops, the original packages I had been using were labeled for use on Thermador and Electrolux cooktop grates. Seeing as how GE uses essentially the same ones, I say, be bold. Give it a try. It's a small price to pay to keep your awesome (expensive) cooktop feeling like new.