actually, it is abour 3-4" in diameter, and appears to be a seal between the stove top pan that the burner sits in. the hole in the stove top has a hole with the supply gas pipe and sitting on top of this pipe is the burner. It appears to be a friction or gravity fit, and there is a gasket between the bottom of the burner head and the top of the stove top. The gasket that I'm talking about is not something that is sealing the actual gas. |