Gear Selector Chrome (Multi Fit) for Land Rover Discovery 4 (2011 onwards) satin black New fitting clips are also New fitting clips are also supplied with this item (they tend to fly off when you remove the old panel) The diameter of the round lamp is around 115mm We suggest a small blob of superglue just to hold the insert in place while you fit the new gear selector (this is just to aid installation as it will be secure once screwed into place) There are actually 2 different types of rotary selector fitted to the Land Rover Range Rover models externally they are identical but the internal fitment is different this is confusing as you would need to remove your gearknob to check and order the correct type