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The HS-322HD Standard Heavy Duty Servo utilizes Hitec's revolutionary Karbonite gear train which is four times stronger than our standard white nylon gears, and even after hundreds of thousands of cycles they don't show any signs of wear. Karbonite gears and our custom IC make the HS-322HD a great choice for an economical sport servo.
(Keep thread locker away from servo horn fastener as it chemically degrades the Karbonite output shaft.)
 "Hitec HS-322HD Servo Karbonite Gear")