Product review (5 stars): Very common failure for gas dryers, great replacement parts!
These gas coils are a very common failure in gas dryers.  If your Whirlpool/Maytag dryer won't heat up or stay heated for the whole cycle, swap these out.  They are incredibly easy to change.  The design of these dryers is pretty nice.  They come apart in 2 minutes with 4 screws to remove which allows you to access everything in the dryer.  A technician would likely charge you $125 to replace these.  They were also available for same day delivery for me.  5 stars!