Our three inch 1/16″ tube, sold separately, fits down inside this larger daimeter (5/64″ OD, 0.066 ID) non-removable tube inside the cabinet. This makes a nice flange at the top of the cabinet. We sell these cabinets like this so that if you want a taller mast, it will accomdate any length.
Showcase Miniatures HO Scale
GRS Cabinet Mount Searchlight Signal