Feature: 1. Aluminum alloy shell, stainless steel gear, it has a long service life with cool appearance. 2. Brushless motor with strong torque and 10 times the service life of coreless motors of the same level. 3. Full waterproof, can be used completely immersed in water, provides you more playing possibility. 4. Accompanying with spare vulnerable steel gear, convenient for future replacement and use. 5. Good performance digital standard servo, suitable for 1/10 1/8RC car, boat and etc, a good replacement choice. Specification: Item Type: RC ServoMaterial: Aluminum Alloy Shell+Stainless Steel GearColor: BlackWeight: Approx. 134.0g/4.7ozQuantity: 1 Set Application: Suitable for 1/10 1/8 RC Car/Boat/Robots etc.Working Voltage Range: 5-7.4V Working Speed (5.0V): 0.13 seconds/60 degrees Working Speed (6.0V ): 0.12 seconds/60 degrees Working Speed (7.4V): 0.1 seconds/60 degrees Stall Torque (5.0V ): 40kg/cm Stall Torque (6.0V): 45kg/cm Stall Torque (7.4V): 50kg/cm Control Specifications: Control System: PWM (batch width modification) Pulse Width Range: 500~2500 μsec Neutral Position: 1500 Microseconds Operating Degree: 180° (500-2500 μsec) Dead Band Width: 2 microseconds Working Frequency: 50-330Hz Rotation Direction: Counterclockwise (500-2500 microseconds) Mechanical Specifications: Gear Ratio: 314 Bearing: Double Bearing Connection Line: Approx. 300mm/11.8in Motor: Brushless Motor Waterproof Performance: IP67. Package List: 1 x RC Servo3 x Servo Arm7 x Screw 4 x Rubber Pad4 x Screw Sleeve1 Set x Gear Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.