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●Use for ALIGN E1、T-REX 700/800. ●Newly upgrade high-strength drive gear for E1/ T-REX 800/700. The new torque tube umbrella gear are made of industrial grade fiber composite plastic steel with high rigidity and high wear resistance features. The flight endurance could be over 250 ~ 400 runs for T-REX 800/700 3D flight, and over 500 runs for E1 Agricultural Helicopter. ●ALIGN E1 must with：E1 122T Helical Autorotation Tail Drive Gear(HE1G003XXW). ●T-REX 700/800 must with：102T M1 Helical Autorotation Tail Drive Gear Set(H70G012XXW).	●Front Drive Gear Assembly x 1 (M1/23T)(Φ5xΦ7.8x53mm) ●Short Umbrella Gear x 1 (M1.25/19T) ●Long Umbrella Gear x 1 (M1.25/19T) ●Bearing(6706ZZ) x 2 (Φ12xΦ18x4mm)