K40 K40BCMAX 20,000 Watts 26 MHz to 30 MHz Helical Coil CB/10-Meter Antenna Open helical coil gives wide bandwidth (26 to 30 mega Hertz) and efficient cooling Tunable 0.200 inches by 48 inches tapered stainless steel whip Great SWR match and tuning outside of normal CB bands Anodized aluminum construction light-weight corrosion resistant Chrome plated brass ferrules and stainless steel stud for strong mounting