This is the Hitec HS-45HB Premium Feather Micro Servo with connector that fits Futaba, Hitec, JR and Airtronics Z radios.

FEATURES: High impact Karbonite gears with ball bearings Slim case with 2mm thick mount support

INCLUDES: One Servo with "X" horn and mounting screws Additional "X" horns and also a long servo horn

SPECS: Size: 23.6 x 9.8 x 22.4mm (.92 x .38 x .88") Output Torque: 1.0Kg-cm (13.88oz-in) at 4.8Volt Operating Speed: 0.14 sec/ 60°at 4.8Volt Weight: 8g (0.28oz)

COMMENTS: For replacement Karbonite gear set order HRCM5025 Case bottom & top order HRCM5428  

BOX DIMENSIONS: 2.00" W. X 1.63" H. X 2.00" L. BOX WEIGHT: .04 LBS.