Crossbow CB Base Station Antenna (210-0967) Specifications Faxback Doc. # 31330 Band Width .........................................................660 kHz Return Loss...........................................................40 dB Lower Rod............................................1 1/4" x 8' Fiberglass Mount........................"Unitized" aluminum bracket, formed and fitted to lower rod of the antenna with two ABS molded retainers. Mounts to mast with 3 U-bolts. Mast Requirements.....................................Up to 1 5/8" diameter Top Radiator............................................96" fiberglass whip Lower Rod/Whip Connector...........Brass fittings,molded in high impact ABS Connector Insulation................None required, because of the exclusive INSUL-MATIC connector (/all-03/22/96)