Set of black Al racing hubs with hollow axels and sealed bearings. I am not sure they are ACS but they have and ACS freewheel on them.  These are super smooth and come with and ACS Claws Chromoly freewheel 16 tooth.  The back hub is in great condition I did notice on the front hub it looks like the flange where the spokes go in has been bent in a little, I am not sure what happened but I tried to take pictures of it.  Feel free to PM me for questions.  Thanks for looking.  All $ from my sales helps fund a middle school bike club.