This is the Gear Set for the Hitec HS-7115TH Slim Wing Servo, HRCM7115.

FEATURES: Molded resin and steel construction

INCLUDES: 1st, 2nd, and 3rd Gear  

BOX DIMENSIONS: 3.00" W. X .25" H. X 3.50" L. BOX WEIGHT: .01 LBS.