This is the True Spike antenna adapter that lets you use any True Spike lug nut cap as an antenna. If you want to use the same lug nut cap you have on your wheels on your antenna, so everything on your vehicle matches, this is the adapter you need. Lug nut caps are sold separately.

Specifications:

- Width: 20MM

- length not counting threads: 28MM

- Female threads: M6x1.0

- Male threads: M8x1.25