Product review (5 stars): Perfect
Like many of the other reviewers here, the knob on my GE dryer (GTDX180ED4WW) broke. Once I realized that it was the hub of the knob that had cracked and not the timer unit itself, I went to GE's parts website to buy a replacement. That would have been about thirty dollars shipped. I had half filled out the order form when I had the idea to just check Amazon. They sell pretty much everything, why not this? Armed with the part number that I got from the GE site, I opened a new tab for Amazon, did a search and, to my pleasure, I found this listing.

It fits my dryer perfectly and is improved in that the hub that broke on the old one now has a metal reinforcement band that I think will prevent that happening to the new one.

One last point: I ordered mine "Shipped from and sold by Amazon.com," even though it costs more.