EcoPower WP860T 1/5 Scale Waterproof Metal Gear Servo for Large Scale ARRMA, Axial, HPI, Losi and others. A high-voltage digital servo with a full metal case and metal gears, delivering 667 oz-in of torque at 6.0V and 861 oz-in at 8.4V with a fast 0.13-second transit speed. The fully waterproof design withstands immersion up to 1 meter for reliable operation in wet, muddy, and demanding large-scale conditions.