This 4" magnet mount base is designed for use with the Wilson OTR antenna (311229) on a pickup truck or SUV. The base is only designed for the short antenna portion of the Wilson OTR with NO extension rods. It is not strong enough to use any of the extension rods. Powerful Signal has a MagMAX 3X designed for use with extension rods.
- 2.5 inches tall x 4.25 inches diameter
- Rare earth magnet
- Standard 3/8 inch x 24 threaded CB mount
- Supports antenna up to 18 inches tall