Brushless outrunner motor specs

I have a couple brushless motors and being new to this, I wanted to know what the first numbers mean? I have a 2808-660 motor. I assume the 660 means KV, but what does the 2808 mean?

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Motor numbers
by: rcdude07

the first set of numbers refers to the motor diameter and motor height. Here are 2 good references:

http://www.rcgroups.com/forums/showthread.php?t=2356982

http://www.dronetrest.com/t/brushless-motors-how-they-work-and-what-the-numbers-mean/564

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