... magnet base Stainless steel whip 631 7~50MHz HF Antenna with spring base comming PL259 connectorStainless steel ... 3-HFM7/50V ELECTRICAL SPECIFICATIONS Frequency Range--------------------- 7.05/10.1/14.2/18.2/21.1 ... is a professional antenna manufacturer.Our main products include HF, CB, VHF&UHF, GSM&CDMA, GPRS, 3G ... and small orders are available 7~50MHz HF Antenna with folding base comming magnet base