Sirio Gain-Master Hi-Tech Fiberglass HW Half Wave 10m & CB Base Antenna Base station antenna, Omnidirectional  0.5 Center feed vertical dipole  Low radiation angle for excellent DX  Fiberglass 3 section composite tube Type: 1/2 Center feeded vertical dipole  Frequency range: tunable from 27.2 to 30 MHz Gain: 0 dBd, 2.15 dBi  Bandwidth @ SWR  2:  1800 KHz @ 27.2 MHz Max. power: 500 Watts (CW) continuous  Connector: UHF-female, PTFE insulator & gold plated central pin Height (approx.): 5560 mm / 11.2 feet  Weight (approx.): 2600 gr / 5.7 lb  Mounting mast:  35-54 mm /  1.4-2.1 in