Housing aluminum; shaft stainless steel; moment of inertia 0.00041 oz in sec sq; hand turned; shaft data-loading 5.0 lbs max axial and 8.0 lbs max radial, torque 1.0 in oz max; cycles 500 shaft turns; power rqmt 5.0 vdc, current 95.0 ma max; output format 2 channels in quadrature porm 27.0 deg