New design of one-way bearing for preventing locking.
* Use for T-REX 550E/600E/600N.
* Must with Autorotation Tail Drive Gear set (H60020A).
* One-way bearing HF1216 x 1(12x18x16mm)
* Main gear case x 1
* Hex socket salf tapping screw x 5(T3x7mm)
* One-way bearing shaft x 1(9x12x34.7mm)
* Washer x 1(11.5x18x0.8mm)