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This is a replacement set of 0.5mm module pinion gears for the Align 450 line of helicopters using motors with a 3.17mm output shaft. These pinions work best with motors in the 3700 and 4050kV range using 3s battery packs or can be used with the 3550kV motors to obtain lower head speeds and longer flight times.

Package includes:

• (2) 12Tx3.17mm pinions
• (1) 3x3mm set screw