Product review (4 stars): These fit in the mounting slots and stay in place just fine. The original glides had completely worn through in ...
My dryer originally had two different types glides, two white and two grey, and I really don't know why. This replacement has four identical glides and that seems to be all right. The replacement glide kit apparently is not an OEM part but it's not priced as such either. What you see is what you get, four strips of thick durable slippery plastic with a hole in one end. These fit in the mounting slots and stay in place just fine.
The original glides had completely worn through in the 15 years I've had my dryer and the drum was rubbing against the plastic frame in the front. After installing these glides, my dryer got noticeably quieter and it's almost certain that the motor does not struggle as much as before to turn the drum.