This is the HPI SF-50 Metal Gear Servo.

FEATURES: Replaces the SF5 steering servo used on HPI trucks and buggies
          Ideal for use in the Savage XL, Savage Flux, and Vorza Flux
          Upgrade for the HPI SF-1, SF-10, SF-2 and SF-20 servos
          Futaba J connector
          Metal output gear

INCLUDES: HPI SF-50 Metal Gear Analog (non-digital) Servo with 1.7" (43.5mm)
            long double sided Servo Horn, Mounting Hardware and Instruction
            Sheet

REQUIRES: Installing in vehicle, connecting steering linkage and plugging into
            receiver

SPECS:    Voltage Range: 4.8 - 6.0V
          Torque: 266.6oz/in (12kg/cm) @ 6.0V
          Speed: 0.18sec/60° @ 6.0V
          Weight: 1.86oz (52.9g)
          Dimensions: 2.1 x 0.78 x 1.2" (53.6 x 19.8 x 27mm)

                                                                   jxs 08/25/11
                                                                         ir/jxs