Description: ●T6061-T Aluminum CNC maching. ●Compatible T-REX 450 Sport. Packaging: ●Metal Main Rotor Holder x 2 ●Bearing(4x8x3) x 2 ●Bearing(4x7x2.5) x 2 ●Linkage Ball(4.75x13mm) x 2 ●Socket Button Head Collar Screw(M3x16mm) x 2 ●Locking nut(M3) x 2