This is a S3002 High Torque Mini Servo for Cars or Sailplanes.
This has metal gears, 3-pole motor, and two ball bearings
This servo can produce high-current draw from your batteries If using NiMH or LiPo batteries, make sure they are capable of delivering sufficient amps.

INCLUDES: One S3002 High Torque Mini Servo w/J connector
COMMENTS: For Mounting Hardware, order FUTM2350
SPECS: Torque: 53 oz-in @ 4.8V - 64 oz-in at 6V
Torque:3.8 kg-cm @ 4.8V - 4.6 kg-cm @ 6V
Speed: .26 sec/60¦ @ 4.8V - .21 sec/60¦ @ 6V
Length: 1.2" (30mm)
Width: .6" (15mm)
Height: 1.2" (30mm)
Weight: 1.3oz (37.2g)
9-15-00 UPDATE The newest shipment of these sevos are now coming with white servo arms, which some customers may mistake for Hitec. They are NOT Hitec. They look like they will fit, but the customer runs the chance of stripping the output shaft if they try to use them on Hitec.