Specification:    
Brand:Dsservo    
Item: DS3218  20KG Large Torque Digital  Servo    
Stall Torque (5V): 19 kg/cm (263.8oz/in)    
Stall Torque (6.8V):  21.5 kg/cm (298.5 oz/in)    
Speed : 0.16 sec/60°(5V) / 0.14 sec/60°(6.8V)    
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: 1520μs / 333hz    
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    
 
Package Included:    
1 x DS3218 20KG Large Torque Digital  Servo    
1 x 25T Adjustable metal servo arm