Firestik (FS-3BK) Black 3' 650W Tunable Tip CB Antenna 5/8 wave length design, rated at 650 watts Can be used in single or dual configurations Requires fine tuning (SWR) Easy-tune bare-hands tunable tip, 3/8 inch x 24 threaded base with tapered contact end Custom blended, glass fiber reinforced shaft, hi-performance loading coil