This is the Hitec D845WP D-Series Mega Scale WP Duo Servo.
The steel D-845WP is part of our D-Series dynamo servo line. All Hitec D-Series servos have been designed using our brand new, cutting edge, custom engineering. Combining industry leading high-resolution, state-of-the-art ultra-response technology with a 32-bit MCU and 12-bit ADC for unprecedented programmability and flexibility, these servos deliver significantly smoother movement. The speedy, powerful line operates on a wide 4.8 ~ 8.4 voltage range, allowing use with any common battery chemistry without the need for adapters or regulators. Featuring Hitec's industry standard 15-tooth output spline with 3mm hex screw, each D-Series servo brings monster performance never known before in the market.
Size Category: Standard
Torque: 451 oz-in @ 4.8v, 562 oz-in @ 6.0v, 694 oz-in @ 7.4v
Speed: 0.26 @ 4.8v, 0.21 @ 6.0v, 0.17 @ 7.4v
Dimensions (WxLxH): 2.60 x 1.26 x 2.44 in (66.0 x 32.0 x 62.0 mm)
Bushing Or Bearing: Bearing
Gear Type: Metal
Gear Material: Titanium