Product review (5 stars): Efficient, inexpensive, replacement part.
I bought a set of these to replace the worn factory rollers.  With some youtube video instruction on how to disassemble and reassemble the dryer, this was a simple DIY for someone with basic mechanical skills.  I had no difficulty with the install, aside from my lack of a snap ring plier, but I improvised and got the job done.  I do advise a snap ring plier, especially for those with lesser experience working on their own appliances.