Weber 91538 Knobs - Summit 420/620
Set of two, control knobs for main burners. Fit Summit 400/600 Series "model years 2007-2011". Diameter of the knobs is 2-3/8". Features red Weber Kettle logo on chrome top, gray body with finger grip notches and "Off/Ignition/High To Low" graphics.
This is a Genuine Weber Part.