Hitec 31311S HS-311 Servo Standard Universal Motor Type: 3 Pole Bearing Type: None Speed (4.8V/6.0V): 0.19 / 0.15 sec @ 60 deg. Torque oz./in. (4.8V/6.0V): 42 / 51, Torque kg./cm. (4.8V/6.0V): 3.0 / 3.7 Size in Inches: 1.57 x 0.78 x 1.43, Size in Millimeters: 39.88 x 19.81 x 36.32, Weight ounces: 1.51, Weight grams: 42.81