You are bidding on 1 used and working, TESTED, GOOD CONDITION ZEBOTRONICS STEPPING MOTOR MODEL SM 86.3.18.J6 1,8 DEGREES +/- 3% STEP ACCURACY HIGH BEARING THRUSTS AND OVERHEATING LOADS DETENT TORQUE 5.0 Ncm OPERATING TEMPERATURE -30 C TO 100 DEGREES C HOLDING TORQUE 350 Ncm UNIPOLAR PHASE CURRENT 3.5 AMPS BIPOLOR PHASE CURRENT 8.4 AMPS RESISTANCE OHMS 0.41 THE ONLY DIFFERENCE IS THE SECOND TO LAST LETTER CODE OF THE MOTOR J= ENGLISH M= METRIC