3/8 thread Sirio Type dv mount.
This mount lets you wing mount any 3/8 threaded CB or Ham radio aerial.
Commonly seen on the wing or light bar of a Land Rover Defender with a large or mini stinger but can also be used on other vehicles including Vans. Lorries taxies or 4×4 in general.
Recommended mounting position is a flat surface.
This mount gives a superior ground plane provided it is installed correctly.