we can machining the graphite block or the graphite rod according your requirement if you could provide us drawing picture, of course we also can design it for you. 

we have been in graphite field for over 20years, We have rich technology and achievements in graphite processing for Domestic and foreign, and can produce and process graphite, C-C composite materials, graphite felt and other thermal insulation materials, especially on the side ofhow to ensure the yield of grooves and holes, Tolerance uniformity, Consistency of polishing