When it comes to arming their RC helicopters with the very best in servo technology, many pilots depend on Hitec. Hitec has now packaged their high resolution, high response helicopter servos in convenient four packs. This gives heli pilots an easy way to grab the quality servo gear that they need to get off the ground fast! The economical, ultra-efficient Economy Pack includes three speedy, steel gear HS-8330SH servos and an ultra-fast, karbonite HSG-8315BH tail rotor servo. The professional, ultra-response Premium Pack includes three powerful, titanium gear HS-8360TH servos, as well as the quick HSG-8315BH gyro servo. Pick your pack and hit the idle up switch!