This is the Savox SW-0231MG "Tall" Waterproof Metal Gear Digital Servo. The SW-0231MG is a brushed motor, waterproof digital servo that delivers great torque for applications that use a larger 42mm tall servo. This servo features a speed of .17 and 208 oz-in of torque @ 6.0V. It combines leading edge technology with super high 12-bit (4096) resolution and metal gears for greater precision when dodging puddles. This is a great upgrade if your looking to drive your RC vehicle in any condition, including rain, sleet, or snow. Features:

• Combines leading edge technology with super high 12 bit (4096) resolution and metal gears
• Waterproof
• Brushed DC motor
• Extremely strong metal gears ensure long-life and durability
• Totally green from materials to production, these servos are environmentally friendly.
• Ideal for RC cars, trucks, buggies, and boats

Specifications: Dimensions (mm): 41.8x20.2x42.9 Weight (g): 66 Speed @6.0V: .17 sec/60 Torque @6.0V: 208 oz-in Gear: Metal Bearing: 2BB Case: Plastic Output Shaft: 25 Tooth Spline