’F-1 AND E1’ Marked These awesome lights have an overall diameter of 122mm (4¾")and mount through a 110mm hole.
30mm depth behind lens. Either bond them in or make a simple U bracket to hold them in place.
You can even surface mount them with the two M6 integral studs.
Super bright LED's give a very bright REAR FOG light.
122mm LED REAR FOG #RL35RF