Rear Wiper Blade - What's Fitted

[Seeker_UK]

In a previous thread, I asked for your help identifying what had been fitted to the rear of my A4 Avant.

I can't find the thread but here is a picture of it hoping you can help - I suspect it's a 'mod' and from an A3 or later model.

 

[unitzero]

I think it maybe a B8 rear wiper. I had a friend that fitted one to his B7