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• Use for T-REX 700E/800E.
• Brand new low drive gear ratio with high strength and wear resistance,effectively reduce the tail vibration during speedy rotation keeping well tail lock performance and power output to prevent unexpected structure issue.
• Gear Ratio 1:4.43

• Front drive gear assembly x 1(ø5xø7.8x53mm) Modulus:1
• 23T M1 Short umbrella gear x 1
• Long umbrella gear x 1