Graupner Servo HVC 860 BB MG Coreless High Voltage Torque Motor Coreless Motor, High Voltage Metal Gearing, Dual Ball Bearing Speed: 0.21 sec/60 @ 4.8 V, 0.18 sec/60 @ 6.0 V, 0.15 sec/60 @ 7.4 V Torque: 208.3 in? Oz (15.0 kg?cm) @ 4.8 V, 243.1 in? Oz (17.5 kg?cm) @ 6.0 V, 284.7 in? Oz (20.5 kg?cm) @ 7.4 V Dimensions: 1.6 x 0.8 x 1.6 in and 2.5 oz., 40 x 20 x 41 mm and 70 g