Hannu, some specs.
12 ceramic magnets .875 x .875 x .4"
Air gap .057"
Two phase 90 degrees out.
One phase 60 volts AC .3 amps at 320 rpm
Other phase 50 volts AC at .27 amps at 320 rpm.
One old ceiling fan, toys, glue, paint, yaw bearing, tail and other stuff.
Total cost about 15 dollars. Bill