Very heavy duty. Used this on my 3' Firestik II CB Antenna. When I traveled at 65 mph, the entire antenna toppled over. The spring was so strong it didn't allow the antenna to flex with the wind. Again, very strong spring. I switched over to a Medium spring and now my CB antenna flexs and the mount stays on the hood.
Verified purchase: Yes | Condition: New
Mounted easily, provided good protection from limb strikes. . . BUT. . . I found it impossible to get any kind of acceptable SWR. After removal very good SWR were easy to adjust.
Verified purchase: Yes | Condition: New
I'm using this with a 3' Firefly, works great! This is best for a lighter antenna like a Firefly, I put a 4" Firestik II on it and it layed back too far at highway speed. For heavy antennas like that 4' or longer use a larger spring.
Verified purchase: Yes | Condition: New
The springs are exactly what I needed for use with the 4ft Firestiks. I tried the medium duty spring and it was too weak for the 4fter. The heavy duty spring keeps the 4fter just a bit off vertical as I go down the road at 65+.
Verified purchase: Yes | Condition: New
Arrived earlier than expected. Very nice spring. Does the job very nicely.
Verified purchase: Yes | Condition: Pre-owned
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