Graupner Servo HVC 660 BB MG Coreless High Voltage Torque Motor Coreless Motor, High Voltage Metal Gearing, Dual Ball Bearing Speed: 0.18 sec/60 @ 4.8 V, 0.15 sec/60 @ 6.0 V, 0.12 sec/60 @ 7.4 V Torque: 97.2 in? Oz (7.0 kg?cm) @ 4.8 V, 111.1 in? Oz (8.0 kg?cm) @ 6.0 V, 131.9 in? Oz (9.5 kg?cm) @ 7.4 V Dimensions: 1.4 x 0.7 x 1.4 in and 1.3 oz., 35 x 16 x 35 mm and 38 g