This is the S9202 Ball Bearing, Coreless Servo designed for Aircraft, and helicopters.The S9202 replaces the S9201 and has nylon gears.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.This is not dustproof as is the S9304, thus is not suggested for cars and trucks. This is not a requirement for servos used in planes.INCLUDES:One S9202 Coreless servo with 2 Ball BearingsOne Accessory Bag (mounting hardware and horns)SPECS:Length: 1.6" (41mm) Width: 0.8" (20mm) Height: 1.4" (35mm)Torque: 76 oz-in @ 4.8V - 98 oz-in @ 6V(5.5 kg-cm @ 4.8V - 7.1 kg-cm @ 6V)Transit Time: .26 sec/60 deg @ 4.8V - .21 sec/60 deg @ 6VWeight: 1.8 oz (50g)COMMENTS:A note on Coreless motors. 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 smootheroperation and faster response time.GEAR SET:FUTM3340