Every antenna should come with a spring to hinder bending movement, and to provide a safe, and stationary setting to be out of the way from others, and surrounding objects.
This antenna spring features 3/8”-24 threads to fit all firestik antennas, mounts, and accessories. This is a heady-duty spring, and can be used with antennas measuring up to 60”. Physically, this spring measures about 3.0”, and has a diameter of 0.800”