I found these on Ebay here:http://www.ebay.com/itm/171429116239?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
I got some because they were cheap, and to find out how much torque they had, and possible applications.
As they photo shows, they are tiny.....The ribbon cable is bigger than the motor as is the header I used for testing. You need to be careful soldering to these, as they do not tolerate overheating whatsoever.
The gear that comes on the thing was useless- so I got out my plastic gear assortment(also Ebay)and found a gear in the mix that pressed right on the shaft with my fingers.The one that comes with it pops off easily with your fingernail.
After checking continuity, I cranked it up and they work perfect with a surprising amount of torque. All the other assorted gears I can now use to get some kind of useful torque and shaft size for an application. It is going to be a challenge just mounting it.
Certainly not for everyone, but is kinda fun to play with on the cheap.
Another amazing discovery-There are even smaller motors to be had.
Loads of fun for a few dollars. That's a good day for me.
Will post whatever I end up making with them.