Firestik SS Medium-Duty Spring Stud Mount "SO-239"

Medium Duty Stainless Steel Antenna Spring 3-Inches Long Antenna Connector: 3/8" x 24 Thread Cable Connector: UHF-Female (SO-239) The medium duty models are great for 2 ft Firestik & Firestik II antennas as well as 3ft FireFly and Road Pal antennas.