This is the VMS Racing antenna adapter for Harley Davidson bikes. If you have a VMS antenna and you have a Harley Davidson bike, this is the adapter you need. This adapter will adapt your VMS/True Spike antenna to your Harley Davidson.

Specifications:

- Width: 10.9MM

- length: 22.5MM

- Male threads (Harley Davidson): 5/16-18

- Antenna threads (all VMS/True Spike antenas): M6x1.0