I purchased this a year or two ago with the intention of installing it on my car. I never did and probably won't.
Manufacturer Page: https://alphaantenna.com/product/alpha-moto-fmj-hf-mobile-antenna/
The Alpha MOTO-FMJ (Full Metal Jacket) provides you with the most Rugged and Compact HF mobile EMCOMM antenna system available.
It requires:
-No extra whips (comes with a 5′ whip)
-No adjustments required for band changes
-No external power required
-No control interface box required
-An external tuner