A. It is made of brass, which makes it relatively sturdy and durable with an exquisite appearance. B. It is easy to use and convenient to replace. C. It can lower the center of gravity and improve climbing performance. D. The weight of each front inner axle housing is about 9.5 grams. E. The weight of each caster base is about 5.5 grams. F. The weight of each outer axle housing is about 5.5 grams. G. It is applicable to FCX24 1/24 scale remote - controlled climbing cars. H. The available color is black. I. The material is brass. J. The package contents are as follows: - 2 brass front inner axle housings for remote - controlled cars. - 2 brass outer axle housings for remote - controlled cars. - 2 brass C - type steering knuckles for remote - controlled cars. - 1 set of installation accessories for remote - controlled cars. K. Generally, only the above package contents are included, and other items are usually not included. L. Note that light reflection and different displays may cause slight differences between the item color and the actual object. The measurement tolerance is approximately ±1 - 3 cm.