The Fans:
The 60mm fan is small, but for the amount of space available in a 1U server it is appropriate. The fan attaches to two steel clips which are actually screwed into the side of the copper heatsink. There is no space between the base of the fan and the tips of the fins. The fan connects via a 3-pin fan header on the motherboard.

Bare Heatsink:
With the fan removed you can see two things more clearly. First off, the heatsink is skived in two parts, and two you can see where the steel clip go in through the copper fins and cause some disruption. Each section is 38mm wide, and each fin about 11mm high.

Side B:
The heatsink is a very simple, just a fan and a block of copper to cool The fan mount screws into the side of the copper fins, and since the fan is rather short, there is little danger of fins breaking off.