H50119A Metal Tail Rotor Holder Use for T-REX 500E / 500ESP / 500E PRO / 500EFL PRO Specifications: Metal tail rotor holder x 2 Bearing MR84ZZ x 4(F4xF8x3mm) Tail rotor hub x 1(F8.8x39.8mm) Thrust bearing x 2(F3xF8x3.5mm) Washer x 2(F2xF6x0.6mm) Socket collar screw x 2(M2x6mm) M4 set screw x 1(M4x3mm) Socket button head collar screw x 2(M3x12mm) Weight:20.5g