Right now they are sitting in a box waiting for me to find some free time. But I did wire them to the Xylotex when I got them and they seemed to have a lot of power. I don't know the exact number, but they have the "B" windings and they have the low inertia rotor. Something like M22NRXBJxxx..., J is the low inertia. You can get them here
http://new.kimcontrols.com/category/...fic-Scientific