That’s a summit grate on the side burner! Need the diffuser to complete it!!That is Genesis Platinum grill. That is a specific knob made for that grill which they do not make anymore. If you can't source one you could always get the Genesis Silver knobs and dye them black and use them on that grill. I have seen that done before. This is what my Platinum use to look like at one point in time.
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Ha! Lol! I'm sure you'd be a great friend too!Can I be your friend? lol, that’s a pretty awesome Christmas gift!
Much better