●Use for T-REX 500.

Specification:
●Front drive gear assembly x 1(Φ4xΦ4.7x42mm)
●Front long umbrella gear-25T x 1(Φ18.5xΦ8x25.4mm)
●Front short umbrella gear-25T x 1(Φ18.5xΦ6.5x11.8mm)
●Pin x 1(Φ1.5x8.8mm)