The K40 K-30 is a 35-inch CB Antenna for mobile/in-vehicle radios. It bears the MPN number 83135298 and does not need holes drilled for mounting. Thanks to its magnet mount, this CB antenna adheres to surfaces with little fuss and stays grounded. The K40 K-30 is a 300-watt antenna is omni-directional and ideal for radio communications. This 35-inch-high antenna is also made out of stainless steel, which increases its lifespan.