Product: Package: Instruction: Specification: Suitable for T-REX 450SE/SPORT to install 450DFC Main Rotor Head Upgrade Set(H45162/H45162QN). H45162: H45162QN: 450DFC main shaft(SE) × 2(Φ5x112mm) Socket collar screw × 2(M2x12mm) M2 Nut × 2(M2) Main shaft spacer × 1(Φ5xΦ9x6mm) M3 Set screw × 2(M3x3mm) Weight:33g