To protect swing shaft pin and differential joint from abrasion.
Compatible chassis:
- FF-03 – use with 54233
- FF-03 PRO – use with 54233
- TA05 ver.II – use with 53919
- TA05 – use with 53919
- TB-03 – use with 54056
- TRF415MSX
- TRF415MS – use with 49426 or 53889
- TRF415 – use with 49426 or 53889