2/4/6/8/10 Pcs SG90 Gear Micro Servo（choice your want size Specification）. Large stall torque of 1.6 Kg. Stall torque: 1.2kg / 42.3oz(4.8V);1.6 kg / 56.4oz (6.0V). Item weight: 9g. This is a servo motor, and its working principle is to rotate and move within a set angle range!
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