American Classic hub and all its parts. This is a rear freewheel hub from 1993 and was on my 8 speed Bike Friday Pocket Rocket. First pic is the hub with all the parts on it. The skewer is an Allen wrench operated type. Second picture is the skewer removed. Third picture is with the caps removed. Fourth picture is hub with the caps in a side view. The last picture is the caps from the end view. You need the caps and AC made many sizes and you need the ones for the hub to make it the correct width. You need to find them and I can't imagine anyone selling you them without selling the full hub. You might be able to have a machinist make you some but either of these two options is going to be expensive. Your caps will be the same length not two different sizes like mine are. AC may be right in that it will just be cheaper to get a different hub/wheel. Edit: the pictures didn't end up in the order I listed them but I think you can figure which is which. They are roughly CCW from the upper left side. Roger