Tram 1487 VHF Land Mobile Base Antenna58 tallFreq range: 134MHz-184MHz 4.5 dBd gainHeavy-duty fiberglass constructionImp: 50ohm UHF female (SO-239) connectorMast dia accepted: 1.81 x 2.44I ncludes bracket & three 20-1/2 stainless steel radialsVHF Land Mobile Base Antenna