Weber Replacement Thermometer 67088, Center Mount, 2-3/8" Diameter Weber Part number 67088 (Replaces Weber Part 67731) Fits Genesis 300 series grills (2007-2016) and Summit (2005-2016) models Includes the wing nut but not the bezel Thermometer has a tab on the back of the head to lock it into place on the bezel Diameter of temperature panel: 2-3/8" | Length of prong: 1-1/2"