This is the Futaba BLS253 Brushless Heli 3D Servo.

FEATURES:

Designed for 3D helis

Standard size

Equipped with metal gears and two ball bearings

30% faster response than standard digital servos and five times longer lasting than servos with brushed motors

Same power consumption as brushed digital servos

One year limited warranty

INCLUDES:

Futaba BLS253 Brushless Heli Servo with universal connector 0.83" (21mm) diameter round horn,

1.8" (45mm) diameter round horn

1.2" (32mm) diameter 6-point horn,

1.5" (38.8mm) diameter 4-point horn mounting screws, eyelets and grommets

REQUIRES:

Installing in heli, connecting linkage and connecting to receiver

SPECS:

Torque: 117 oz-in (8.4kg/cm) @ 4.8V 147 oz-in (10.6 kg/cm) @ 6.0V

Speed: 0.13 sec/60¢X @ 4.8V 0.10 sec/60¢X @ 6.0V

Size: 1.6 x 0.8 x 1.5" (40 x 20 x 37mm)

Weight: 2.0 oz (58g)