Product review (1 stars): Concept is great. They blend well
Concept is great. They blend well, cover the gap as intended but then they warp with the heat of the burner. There is no way to return them to the original condition rendering them useless and quite an eyesore. If you buy them, they are expensive for what you get but can work as intended if you  consciously pay attention to the burner heat. For me it was about a month before I had to get rid of them...$$ wasted.