These were installed yesterday.  Upon removing from the box, the brass rods were not a uniform color, and some of them had a black residue that I was unable to remove with magic eraser, Dawn dish soap, etc.  Electrician's last day on our home remodel so we went ahead and had him install.  The rods are adjustable, but we could not hang exactly 36 inches from island- we chose higher since our cook top will be under them.  With that being said, installation was fairly quick and simple, you don't notice the black residue and we chose the rods that were most alike in color, and my husband LOVES how they look in the space.