Apparently, it is an antenna that can also be used as a shank. It can be mounted at the front of the roof on the vibe right above the (front) rear view mirror. you'll just need to have an anntenna extension wire running on top of you roof. Or you can mount it at the rear of the roof right above the (rear) rear view mirror (so when you are looking back, backing up you can see forward as well. The best part is that the Shank fin antenna is nonthai, so that's a bonus. but it also say it ships from Thailand - I'm soooo confused!! I haven't found who sells the (rear) rear view mirror yet, but if that is thai, I'm not getting it because apparently they don't make quality parts. :
http://cgi.ebay.com/ebaymotors...ories