Refractory ceramic goods; composition of which n.e.c. in heading no. 6903, other than those of siliceous fossil meals or similar earths

69039000 Other

6903900010 Of clay

6903900050 Other

6903900000 Refractory ceramic goods; composition of which n.e.c. in heading no. 6903, other than those of siliceous fossil meals or similar earths

6903901000

6903909000

6903909040

6903909090

69039000 Other

6903901000 Containing, by weight, more than 25|% but not more than 50|% of free carbon

6903909040 Silicon carbide reactor tubes and holders having a maximum service temperature of 1370 °C or more

6903909090 Other