This ad is for a genuine General Motors - Cadillac Mega Shark Fin antenna. It is for the 2014 Cadillac ELR only. 

Already factory painted to match your car. I am not 100%, but I believe the paint color is "Graphite Metallic" . It has never been installed, but I do not have the manufacturer's packaging for it.

9" long 

3-3/8" wide