?Suitable for T-REX 600DFC . ?Use for T-REX550E/600E PRO 3G Programmable Flybarless System. ?6061-T6 Aluminum alloy material and CNC processed. | ?600DFC Metal Main rotor holder arm x 2 ?Socket buton head collar screw x 4(M3x6mm) ?Socket buton head screw × 2(M3x19mm) ?Washer × 2(Φ3xΦ4.8x0.3mm) ?Weight:12g |