Features: Step angel ( íp) : 1.8 Motor length l(mm): 99/150/201 Rate voltage (v): 4.95~5.44 Rate current (a): 5.5~8 Phase resistance ( ª+ ): 0.67~0.9 Phase inductance (mh): 12~15 Holding torque (n.M): 11.2~28 Lead wire (no.): 4 Rotor inertia (g. C¬o): 5.5~16.2 Motor weight (kg): 5~11.7