Sirio Antenna Sirio Md 118-137 Aviation Antenna Suitable for aeronautical service, omnidirectional mono-band, unity-gain recommended for installation on small aircraft flexible stainless steel radial Type: dipole 1/2 with loaded radial frequency range: 118-137 MHz for aeronautical band impedance: 50 radiation (h-plane): 360 omnidirectional Polarization: linear vertical gain: 0 dbd - 2.15 dbi max. Power (cw) at 30c: 50 watts cable length Materials: Stainless Steel 17/7 PH, Nylon, Chromed Brass, Zamac Wind resistance: 220 Km/h