The Apple 60W MagSafe 2 Power Adapter is made specifically for the 13-inch MacBook Pro with Retina display. Model # MD565LL/A. Ships in original box.
I had to buy this power adaptor when I was at a conference because I foolishly forgot to pack mine. It has been used twice. The box shows a little wear from being packed, otherwise in mint condition. I really don't need two power adaptors sitting around, so here it is for sale at a good price. It's regularly $79 at Apple.