For my Spirit II 300 grill, these fit almost exactly by length. They are definitely narrower than the OEM pieces… not sure if that’s important or not. You may be able to flatten them out a little to make them wider, not sure if that’s recommended or maybe not suggested. They seem thicker than the OEM pieces too, again not sure if that matters. I didn’t expect them to be a perfect match to OEM. These are basically pieces of metal folded into a V shape… nothing fancy. They are a little narrower than OEM, but they do cover the burner.