SINCLAIR's SD214-HF2P4LDF(D00S) 138 – 174 MHz low band, aviation, and VHF antennas. 4 dipoles, 7.5 dBd, low PIM, offset, side mount, HD. Vertical polarization, 300 W, 0 deg. downtilt. The SD214-HL series is heavy-duty, low intermodulation, extremely rugged four-bay exposed dipole antenna designed for applications where the moderate gain is required.