High Quality Servo, Big KG Rating, Super Fast Speed, IP67 Waterproof Rated !

Specification

Operating Voltage: 4.8-8.4 V
Operating speed: 0.115sec/60° @ 6.0V
Operating speed: 0.100sec/60° @ 7.4V 
Operating speed: 0.087sec/60° @ 8.4V 
Stall Torque: 39 kg-cm (556 oz-in) @ 6.0V
Stall Torque: 48/ kg-cm (681 oz-in) @ 7.4V
Stall Torque: 55 kg-cm (765 oz-in) @ 8.4V 
Gear: Steel
Motor: BLS
Size: 40*20*37.5mm (1.57 x 0.78 x 1.46 in)
Weight: 88.5g 
Connector Wire: TYU 300 mm

Feature 

Fine Machining Aluminium Shell
Smooth Ball Bearings
High Efficiency Long Life Brushless Motor
Programmable Digital Circuit
IP67 Waterproof & Dust-proof