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The SG90 Servo Motors comes as a set of Five motor modules that boasts three pairs of blades that can rotate from 0 degrees to 180 degrees. The connector wire measures 150mm in length which is sufficient to install it on a breadboard. Simply plug in the included arm and gear assortment and start experimenting for your next DIY project!FUNCTIONING OF THIS SG90SG90 Servo can rotate approximately 180 degrees (90 in each direction) and works just like the standard kinds but smaller. It will fit in small places. It comes with 3 horns (arms) and hardware.PRODUCT APPLICATIONSSG90 is high torque motor which is commonly used in robotics and several other applications due to the fact that it's easy to control their rotation. Servo motors have a geared output shaft which can be electrically controlled. This can be used as actuators in many robotic arms, or as a steering system in RC toys. Due to its lightweight, it can be used in multi-DOF robots like humanoids.TORQUE WEIGHTAGEThis SG90 generates 2.5 kg-cm (Apx.) torque which means the motor can pull a weight of 2.5 Kg when it is suspended at a distance of 1 Cm. So as load suspended distance reduces load pulling capacity will increase.