Onyx S55 Standard Heavy Duty Servo.
Specifications:
Servo Operating Voltage: 4.8 – 6.0V
Servo Size Category: Standard
Gear Material: Metal
Spline Count: 25 Teeth
Bearing: Dual
Torque: 181 oz-in (13.1 kg-cm) @ 4.8V;203 oz-in (14.6 kg-cm) @ 6.0V
Length: 1.6 in (41 mm)
Weight: 2.1 oz (58 g)
Bushing Or Bearing: Bearing
Height: 1.5 in (38mm)
Speed: 0.24 sec/60 deg @ 4.8V, 0.21 sec/60 deg @ 6.0V
Width: 0.79 in (20 mm)