I realize that it says it fits a spirit 300 grill and the Spirit 300 use the same cooking grates as the Silver B/C, but I am wondering if this will still fit the B/C grills. I can't find anywhere that says it specifically will.
I found it listed on Amazon and one of the questions asked was regarding the dimensions. Answer was 12.34" x 17.44". One reviewer stated it fit his Silver C. Obviously Weber missed out by not marketing this to a wider audience.
It fits the silver b/c and the 1000’s series. The issue is it will take more than 1/2 of the grill. Ergo you’d have to use the plancha by itself or get another grate that’s about 1” less wide than normal.