Cb 3 Way Mirror Mount (double groove) w/SO239 stud
The double groove Cb antenna mirror mount can be used for many applications. Most often for small round mirror bars on Big trucks or pick-up trucks. The double and single groove mirror mounts are usually interchangable. If your not sure which one to get, either will work on the small mirror bars.
*For use with standard 3/8 thred antennas