you won't find the spec online as these are custom windings, probably for a plotter. They retail for 10Euro on a polish auction site so don't expect great things, they're likely to be fairly high inductance and relatively low torque, around 0.8 - 1Nm, or 112 - 140ozin. You'll get some movement but feedrates will be severely limited. Even then you'll need to be running them at 40v+