Balance Wheel PU 万向轮

Bearing 6205 轴承

Shaft 轮轴销

Cover 防尘盖

Screw M8x12 螺钉

Lower Cover 下罩

Nut M8 夹片螺母

Upper Cover 上罩

Screw M8x20 螺钉

Nut M8 夹片螺母