●Use for T-REX 450 Pro

 â—Metal main rotor holder x 2
●Linkage ballA(M2.5x4) x 2(Φ4.75x13mm)
●Bearing MR84ZZ x 4(Φ4xΦ8x3mm)
●Socket collar screw x 2(M3x16mm)
●M3 nut x 2