Description: ●Due to the flybarless construction of this rotor head, an electronic flybarless system is required for operation . ●T6061-T Aluminum CNC maching. ●Compatible T-REX 450. Packaging: ●450 Four-blades main rotor head set x 1 ●450 Four-blades swashplate x 1 ●450 Four-blades Control Arm x 1 ●Main Shaft x 1 ●Socket button head screw(M2x12) x 1 ●Locking nut(M2) x 1 ●Linkage Rod A(M2x30mm) x 4 ●Linkage Rod B(M2x26mm) x 3 ●Rod head x 14 ●Linkage Ball x 4