Use for T-REX 500L.
Steel ball parts is made of rigid stainless steel, features wear-resisting, and anti-oxidization.

* 4.7 Linkage ball B(M2.5x3) x 1 (4.75x25.25mm)
* 500 Linkage ball B(M2.5x3) x 2 (4.75x9.77mm)
* 500 Linkage ball A(M2.5x3.5) x 2 (4.75x8.18mm)
* 4.7 Linkage ball E(M2.5x2.5) x 2 (4.75x11.5mm)
* Linkage ball A(M2x3.5) x 1 (4.75x8.18mm)
* Linkage ball C(M2x4) x 1 (4.75x13mm)