Product review (5 stars): These are sturdy and they last
This is my second set of these burner covers.  The enamel coating on these is of good quality.  The first set I had lasted years and years.  If it hadn't been for leaving a burner on for too long, I wouldn't have needed the new burner covers.  I was so glad when I could find the exact same thing.  I hope they will still be in production the next time I need to replace them.