This is a replacement ProTek R/C Servo Gear Set compatible with both the PTK-170SBL and PTK-270TBL ProTek R/C "Black Label" Brushless Servos. This set includes the necessary internal gears, as well as bearings.
How To Change Your RC Servo Gears: AMain Hobbies' RC Talk
ProTek R/C is an AMain Sports & Hobbies brand.
