Shimano Dura-Ace RD-7700 9 Speed Short Cage Rear Derailleur.

This top of the range derailleur is designed for bolt-on mounting and is compatible with many road bikes. I removed this item from a bike that I recently purchased and looking at the condition, it clearly has had very little use. I wanted to fit some lower gearing to the bike and the 12-27 cassette fitted wasn’t suitable for the hilly area I live in. This cassette is listed separately. There are some very light scratches on the front of the derailleur (see photo) but if these were a problem they could easily be polished out.