Part No.: 28BYGH102Single Shaft Frame Size:NEMA11 Step Angle: 1.8 degree Voltage: 3.8VDC Current: 0.67A/phase Resistance: 5.6Ohm/phase Inductance: 3.4mH/phase Holding torque: 60Kg-cm Rotor inertia: 9g-cm2 Detent torque:� 4kg-cm Number of wire leads: 4 Weight: 0.11KG Length:32mm Front shaft diameter: 5mm Front shaft length: 20mm round shaft This model is for Single shaft, with 5mm motor shaft, 20mm front shaft length, round shaft More Order Quantites, more discount