This signal does not include the post which is a section of K&S brass tubing with a Dia. of 3/32" or 2.4mm. See: http://www.ksmetals.com/26.html The signal will accept 3mm LEDs on the main aspect. Other items such as Fog Repeater and Rail Gap Indicator are available which will slide onto the same pole. This is identical to the other 2 aspect signals, but with extended shades, as can be found in the earlier LU era.