Align T-REX 700FL Main Shaft Use for T-REX 700N 3G Flybaless System, Use for T-REX 700E 3G Flybaless System. 700EFL Main shaft x 2(8*12*205.5mm) Socket collar screw x 1(M4x24mm), Socket collar screw x 1(M4x27mm) Socket screw x 2(M4x8mm) M4 nut x 2