ANLI TA-1UHF Antenna Trunk Mount For SO-239 Thread Antennas UHF or SO-239 Thread Trunk mount accepts Optional Antennas having a PL-259 " UHF , M or PO " base thread. For Standard Sedan type Trunks. Includes 15ft RG-58A/U Coax cable with PL-259 Connector. Great for Amateur radio & Two way mobile antennas having an UHF base thread. Fits ANLI WH-713 and WH-717 DualBand antennas, & other " UHF" ( SO-239 ) type base thread antennas. Heavy Duty with 4 Allen bolt connecton and Ability for slight angle Adjustment