This is made by crushing electrodes which are baked after mixing CPC with coal tar. Typical specs as follows: F.C.: =>97% S.: =<0.8% A.: =<1% V.M.: =<1% W.: =<0.3% Size: 100x150mm, 150x200mm, 200x250mm They are perfect carbon raiser for iron/steel smelting. It is also used in arc furnace.