Carbon Graphite Medium Grained Rods 1.Dia from 37-700, lengh from 500- ... : Heater Insulations,Casting,Etc. 3 We can supply Carbon Graphite Medium Grained Rods with sizes, diameter from 37mm to 700mm, lengh ... from 500mm~2500mm. Our Carbon Graphite Medium Grained Rods can be applied in the following aspects:Crucibles ...