This is the Futaba S9202 Ball Bearing Coreless Servo designed for airplanes and helicopters. The S9202 produces 76 oz/in of torque at 4.8V, and 98 oz/in at 6V.  The S9202 replaces the S9201 and has nylon gears.  This, and other Futaba products have a 1-Year Warranty for defects in materials & workmanship.

This is not recommended for cars and trucks.

INCLUDES:
One S9202 Coreless servo with 2 Ball Bearings
One Accessory Bag (mounting hardware and horns)

SPECS:
Length: 1.6"
Width: 0.8"
Height: 1.4"
Torque: 76 oz-in @ 4.8V - 98 oz-in @ 6V
Transit Time: .26 sec/60 deg @ 4.8V - .21 sec/60 deg @ 6V
Weight: 1.8 oz

What is the advantage of a coreless motor?  A conventional servo motor has a steel core armature wrapped with with wire that spins inside the magnets. In a coreless design, the armature uses a thin wire mesh that forms a cup that spins around the outside of the magnet eliminating the heavy steel core. This design is much lighter resulting in smoother operation and faster response time.