Specification:

Item: DS3218  20KG Large Torque Digital  Servo
Operating Voltage: 4.8 ~ 6.8 DC Volts
Dead brand: 3μs    
Weight: 60 g (2.12 oz)
Motor Type: DC Motor
Gear Type: Copper & Aluminum
Working frequence: 50-333Hz
Operating travel:180°（PWM 500-2500μs）
              OR 270°（PWM 500-2500μs）
Size: 40 x 20 x 40.5 mm ( 1.58 x 0.79 x 1.60 in)
 
Features:
- High performance  digital  standard servo
- High-precision metal gears with hard anodizing
- CNC aluminium middle Shell
- Dual ball bearings