Hitec 37955S HS-7955TG Ultra Torque Titanium Gear Digital Servo Motor Type: Coreless Bearing Type: Dual Ball Bearing Speed (4.8V/6.0V): 0.19 / 0.15 Torque oz./in. (4.8V/6.0V): 250 / 333, Torque kg./cm. (4.8V/6.0V): 18.0 / 24.0.Stall Current :4,200mA Size in Inches: 1.57 x 0.78 x 1.45, Size in Millimeters: 39.88 x 19.81 x 36.83, Weight ounces: 2.29, Weight grams: 64.92