It fits my Weber Searwood 600 perfectly. You have to remove grill before you install it. It is great to cook almost everything without worrying about your food falling through the grill.
the griddle works great! we have made bacon (perfect and no mess), smashburgers, sausage, steel head trout, and veggies. heats up quickly and puts a nice sear on steaks, fish, etc. we started with the bacon and burgers, as recommended. only used oil with the veggies and fish. very easy to clean as well.