The FireStik II FS Series Antennas feature upper coil extension to increase the power handling capability of the antenna. High performance coil maximizes the transmit/receive functions of your CB. These top-loaded antennas will also receive the NOAA emergency weather alert and national weather broadcasts for radios with those features. Tunable tip requires fine tuning (SWR) in their final mounting location. This product ships in approximately 1 days