Very long indeed! But they look pretty good. To bad it doesn't fit in my Fractal Design R3 :(
http://www.zalman.biz/HighResolution/Zalman/ZM1000-HP_Plus/large/0022.jpg
You can find other pictures here: http://www.zalman.biz/HighResolution/Zalman/ZM1000-HP_Plus/
Some extra information of the ZM-SF3:
Speed : 900 ~ 1,500rpm ±10%
Noise Level : 18 ~ 23dBA ±10%
Air Flow : 35.6 ~ 60.4CFM (Avg.)
Static Air Pressure: 0.66~ 1.53mmAq (Avg.)