Main Shaft H50086Instruction:Use for T-REX 500.Specification:Main shaft x 2(Φ4xΦ8x153.3mm)Lock collar x 1(Φ8xΦ14x6mm)M3 set screw x 2(M3x3mm)Socket collar screw x 2(M2.5x19mm)M2.5 nut x 2