Hitec RCD 36845 D-845WP 32-Bit Monster Torque Waterproof Steel Gear Servo Motor Type: Coreless, Bearing Type: Dual Ball Bearing Speed (4.8V / 6.0V / 7.4V): 0.26 / 0.21 / 0.17 sec/60 Torque oz-in (4.8V / 6.0V / 7.4V): 451 / 562 / 694 oz-in, Torque kg-cm (4.8V / 6.0V / 7.4V): 32.5 / 40.5 / 50.0 kg-cm Size in Inches: 2.60 x 1.26 x 2.44 in, Size in Millimeters: 66.0 x 32.0 x 62.0 mm, Weight oz: 8.0 oz, Weight g: 227 g