This is the Hitec HSR-5980SG HMI Digital Robot Servo.

FEATURES: Durable steel gear with dual ball bearings
          Programmable digital amplifier with MOSFET drive
          Created specifically for the hobby robotics market
          Bottom Side Axial Mount Hole
          Water and dust tight
          Ultra Hardness shaft with 2 axial metal bushings
          Overload protection

INCLUDES: One Hitec HMI Digital HSR-5980SG digital robot servo
          One bottom case

SPECS:    Size: 1.57" x 0.78" x 1.45"  (40 x 20 x 37mm)
          Weight: 2.46oz (70g)
          Torque: 333.29 / 416.61 oz.in (6v/7.4v)
          Speed: 0.17 / 0.14 sec @ 60 deg.
          Operating voltage: 6.0 to 7.4V
          Max speed: 0.17 sec/60 degrees at 6.0V
                     0.14 sec/60 degrees at 7.4V
          Stall Torque: 24.0kg.cm (333.29oz.in) at 6.0V
                        30.0kg.cm (416.61oz.in) at 7.4V
          Connector wire length: 300mm (11.81in)

                                                                    tlw 6/21/07
                                                                         ir/jxs