The ProComm JBC300W is a 3-foot fiberglass CB antenna designed for reliable performance on the 26.9 to 27.4 MHz citizens band. It features a 750-watt power rating and a 5/16-inch fiberglass core for added durability. The antenna uses a top-loaded, 1/4 wave helically wound design with 20 gauge copper wire to ensure consistent signal quality. A chrome-plated 3/8-24 ferrule provides a secure connection, and it comes factory tuned while still allowing for field adjustments if needed.