That's a thick $25 insulating gasket. If the same carb is going back one i would be inclined to hit it with some carb cleaner and spruce it up. If a different carb was going back on I would replace it so you don't get leaks where it has been compressed and not lining up with a different carb. New thin gaskets either way. I have one of those under my AVS2 and it seemed to work well.
