Sirio CX 220 (219-226MHz) J-POLE VHF Base Antenna Base station antenna, Mono-band Low-gain, Omnidirectional Protection from static discharges DC-Ground Made of aluminium alloy 6063 T-83 Type: 3/4 coaxial J-pole Frequency range @ SWR 1.5: CX 220: 219-226 MHz Impedance: 50 Radiation (H-plane): 360 omnidirectional Polarization: linear vertical Gain: 2dBd - 4.15 dBi Max. power (CW) @ 30C: 200 Watts Grounding protection: All metal part are DC-grounded, the inner conductor shows a DC-short Connector: N-female Materials: Aluminium, Brass, Steel, Nylon Wind load / resistance: 25 N @ 150 Km/h / 180 Km/h Wind surface: 0.02 m Height (approx.): CX 395: 646 mm Weight (approx.): 450 gr Mounting mast:  35-42 mm