Can anyone confirm if these are Aero side skirts?

[s13q]

Im looking to buy them, Im just not sure if they are Nismo/Aero sideskirts.

It doesnt state what brand they are in the advert but it does say they are plastic.

Any help would be great

http://i.imgur.com/3ZNWT9k.jpg

[enkei2k]

http://zilvia.net/f/chat/174916-identify-thread.html