Align One-Way Bearing Shaft for T-REX 550/600E/600N/600 Pro

One - way bearing shaft x 1 ( 9 x 12 x 34.7mm ) Washer x 1 ( 11.5 x 18 x 0.8mm ) Suitable With Use with 180T M0.6 Autorotation Tail Drive Gear ( H60020A ) :Must with Torque Tube Front Drive Gear Set ( H60121 ) or ( H60147 ) or ( H60122 ) Suitable use for Trex 600E / 600N / 550E Use with 131T M0.8 Autorotation Tail Drive Gear ( H60198 ) :Must with Torque Tube Front Drive Gear Set ( H60228 ) or ( H60229 ) Suitable use for Trex 550E upgrade ( Suggestion ) Designed for Align Trex 550E / 600E / 600E PRO / 600EFL PRO / 600N