Originally Posted by Harbormaster
I have never checked, to be honest.
The SJP is not the same as an 18.5 kettle mind you. Pretty sure the cooking grates are different sizes (SJP is actually an 18" grate I think).
If I think of it, I'll get one of my SJPs out and see if the lid fits on a kettle.
Also, Weber re-introduced the SJP this year, and it is different than the original SJPs of yore.
I asked the guy who has it and he measured inside the lid at 18.5". I want the lid for a mini uds, 18.5" would be golden :-), 18 not so much. This one has the single bottom vent and 3 bent aluminum legs