Sirio SDB 270 2m/70cm Dual band Mobile Antennas Mobile antenna, Dual-band Omnidirectional, Unity-gain 17/7 PH stainless steel spring whip 90 inclination and adjustable whip, detachable for car-washes access Type: Type: VHF 1/4 , UHF 3/4  Frequency range @ SWR 2: SDB 270: VHF 137-154 MHz, UHF 418-458 MHz Impedance: 50 Radiation (H-plane): 360 omnidirectional Polarization: linear vertical Gain: 0 dB ref. to a  /4 whip Max Power (CW) @ 30C: 100 Watts Standard mount: "SL-S" Cable Type / Length: 5 m / RG 58 Materials: Stainless Steel 17/7 PH, Chromed Brass Height (approx.): SDB 270: 535 mm Weight (approx.): SDB 270: 360 gr Mounting Hole:  19 mm