This is the Ace RC S2008MG High Torque 2BB Servo.

FEATURES: Best used as a steering servo for either a buggy or truck
          Two ball bearings
          Universal connector
          Metal gears
          4M gear type
          18 month warranty

INCLUDES: One S2008MG high torque servo, two 1.7" diameter serov horn,
            4 eyelets, 4 rubber grommets, 4 nylong locknuts

SPECS:    Dimensions: 1.59 x .79 x 1.49" (40.4 x 20 x 37.9mm)
          Weight: 1.77oz (50.1 g)
          Speed: 0.21 sec/60° @ 4.8V
          Torque: 108.3 oz-in @ 4.8V (7.8kg/cm)
          Power Supply 4.8V or 6.0V

                                                                     JAW 2/1/11