1 x JX racing PS-4503HB standard size servos.

SPECIFICATIONS:
Dead band: 7µs     
Working frequence: 1520µs / 50hz                   
Operating Speed (4.8V): 0.15sec/60°
Operating Speed (6V): 0.12sec/60°
Stall Torque (4.8V): 3.25kg.cm (45.14oz/in)
Stall Torque (6V):  3.95 kg-cm (54.87 oz/in)
Dimensions: 40.5X20.3X38mm
Weight:  45.5 g (1.61oz)
Connector Wire Length: JR  265 mm

Gears Plastic