Refractory ceramic goods; containing, by weight, more than 50% of free carbon, excluding those of siliceous fossil meals or similar earths

6903100000 Containing by weight more than 50 percent of free carbon

6903100000 Refractory ceramic goods; containing, by weight, more than 50% of free carbon, excluding those of siliceous fossil meals or similar earths

69031000 Containing by weight more than 50% of free carbon

6903100000 Containing, by weight, more than 50 % of free carbon