Firestik II "FS" Series antennas have all the proven features and performance of the famous "KW" series antennas with the addition of a tuneable tip. All "FS" antennas may be used in single or dual (co-phased) configuration. Like all CB antennas, the "FS" antennas should be fine-tuned (SWR) in their final mounting location. To tune a "FS" antenna, you just pop-of the tip and turn the adjustment screw up or down as needed. The "FS" antennas are 100% American made with 100% American materials. The 3/8"-24 threaded base is compatible with Firestik mounts and accessories. This FS3-G is 3 Ft. long (92cm), 5/8 wave, is rated @ 650 watts, and is GREEN in color.