The fan is not labeled, but given the sound it makes and the size of the unit I would peg it around 4500-5000RPM or thereabouts. Again, don't have the exact specs though. The fan comes with a nice shinny fan grill, and draws its power via a three-pin motherboard fan header.

The copper base is exactly 5mm thick and the fins 0.1mm or so. The copper fins each have five vents in them to promote some cross flow of air. The fins are spaced 1.75mm apart and are roughly 20mm tall. Here you can really see what the clip looks like, and although the thumb hold is small, it is not difficult to clip if you have a bit of room around the socket.

Heatsink Base:

The base on the P5750 is perfectly flat, but a little on the rough side. Interestingly, it is not as rough as it looks in this picture, but there are still a few too many sanding marks for the purists out there. Flatness is very good, and with a few minutes on the 600 or 800 grit wet sandpaper you could improve things nicely.