This was attached to a Brompton I bought used, but I'm more used to Minoura, so I'm offering it to someone. As expected of machined aluminum. It's incredibly light, incomparable to Minoura. There are scratches on the joint that will be hidden when installed, but I think they are scratches that will be there regardless when attaching it. Other than that, I don't think there are any noticeable scratches.