The size ranges from 3mm to 100mm for O.D., and the length is from 10mm to 3000mm. We can also design Selection of a variety of high-quality ceramic materials, hot, dry-pressed or injection molding, from high-temperature sintering of alumina ceramic tubes, alumina ceramic rods (which can be mechanical or electronic finishing, the tolerances up to ± 0.01mm.), high hardness , insulation, wear- ...