Our client want to purchase graphtie ball from us, we offer two kinds of materials for their choice. You could see on the surface, one is smooth, another one is rough.

The difference of the surfaces is caused by the grain size and density of the material.

The smaller the grain size is, the smoother the surface is.

The bigger the density is, the less holes the surface has.

Our machining tolerance is very small, could meet your strict requirements.

The client is very satisfied.