Sirio GP 87-108 LB/N 87-108 Mhz VHF Base Antenna (U connector) Type: 1/4 Wavelength ground plane large band Frequency range: GP 87-108 LB: RADIO band 87-108 MHz @ SWR  2.5 Impedance: 50 ohms Radiation (H-plane): 360 omnidirectional Radiation (E-plane): beamwidth @ -3 dB = 78 Radiation angle: 0 Polarization: linear vertical Gain: 0 dBd - 2.15 dBi Max. Power (CW) @ 30C: 1000 Watts Grounding protection: All metal parts are DC-grounded, the inner conductor shows a DC short Connector: N Materials: Anodized Aluminium, Stainless Steel, Nylon Wind load / resistance: GP 87-108 LB: 67 N @ 150 Km/h / 160 Km/h; GP 87-108 LB: 1190 mm