The compact overall length on the Glomex Marine 20.9 VHF Antenna makes it ideal for small vessels such as rigid inflatable boats. The 3dB-gain antenna includes your choice of an integrated ratchet mount or L bracket to mount on vertical flat surfaces. Black flexible steel whip has a helical design to eliminate excessive whipping action. Includes 20-ft. of RG-58C/U coax cable (26-ft. with Bracket kit). Available: Antenna with Base, Antenna with Bracket. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Antennas.