Hitec HS-646WP High Voltage, High Torque Metal Gear Analog Waterproof Servo This is a Hitec HS-646WP High Voltage, High Torque Metal Gear Analog Waterproof Servo. Our new waterproof servos have what it takes to keep your radio control vehicle, airplane or robot watertight! With high torque, dual ball bearings and metal gears, our analog waterproof servos have the industry’s first IP67* rating ranking them among the most durable and reliable servos for wet conditions. Whether you are manning your power boat, bashing in the mud, directing your underwater robot, or water landing your 25% plane, the HS-646WP will dependably keep your mind at ease. Features: • High Voltage Digital Circuit • Metal Gears and Dual Ball Bearings • Waterproof Construction Specifications: • Motor Type: 3-Pole • Bearing Type: Dual Ball Bearing • Speed (6.0V/7.4V): 0.20 / 0.17 • Torque (6.0V/7.4V): 133oz.in. / 161oz.in. • Torque (6.0V/7.4V): 9.6kg.cm. / 11.6kg.cm. • Size: 1.65 x 0.83 x 1.57" (41.8 x 21.0 x 40.0mm) • Weight: 2.12oz (60g)