This is the HPI SF-20W Waterproof Analog Servo.

FEATURES: Custom IC chip for high torque
          Carbon graphite gears
          Compatible with HPI receivers and all Futaba radio gear

INCLUDES: HPI SF-20W Servo with Heavy Duty Horn and Instructions

REQUIRES: Installing in vehicle and connecting to linkage and receiver

SPECS:    Voltage Range: 4.8 - 6.0V
          Torque: 6.6kg/cm @ 6.0V
          Speed: 0.17 sec/60° @ 6.0V
          Length: 1.9" (48mm)
          Width:  0.78" (19.8mm)
          Height: 1.4" (36mm)

COMMENTS: For replacement gears, order HPIM2765

                                                                   jxs 06/07/11
                                                                         ir/jxs