Hitec 31055S HS-55 Economy Sub Micro Universal Servo Motor Type: Coreless Bearing Type: None Speed (4.8V/6.0V): 0.17 / 0.14 sec @ 60 deg. Torque oz./in. (4.8V/6.0V): 15 / 18, Torque kg./cm. (4.8V/6.0V): 1.08 / 1.30 Size in Inches: 0.89 x 0.45 x 0.94, Size in Millimeters: 22.61 x 11.43 x 23.88, Weight ounces: 0.28, Weight grams: 7.94