This is a genuine Nissan part made to fit the 2008-2013 Altima 2 door models only. This one came off of a 2008 in sunny Northern California, it is factory painted in color code K12 Radiant Silver Metallic. The paint finish is glossy and looks good, there are no clear coat issues. The mounting nut, rubber seal and wiring are all in very good condition. 

See photos, that is the actual antenna you will receive.