X30: Dual Band Vertical Antenna - 144/430MHz(2m/70cm) VHF/UHF Length: 1.3m - Radial length: approx.19cm - Weight: 0.8kg - Gain: 3.0dB(144MHz),5.5dB(430MHz)Max.power rating: 150W(Total)Impedance: 50ohms - VSWR: Less than 1.5:1Rated wind velocity: 60m/sec. - Mast diameter accepted:30mm to 62mm - Connector: N-TYPE FEMALEType: 1/2wave (144MHz), 2x5/8wave (430MHz), FRP outershell