Rgbzone 4Pcs S3003 Servo Motor Standard Rc Servo High Speed For Smart Car Robot Boat Rc HelicopterSpecifications: Type: S3003 Material: Plastic Gear material:Plastic Color: Black Stall torque: 3.2 kg / cm (4.8V), 4.1 kg / cm (6.0V) Operating speed: 23 sec /60 degrees (4.8V), 19 sec / 60 degrees..