Section V — Mineral products
Subheading
250860
Mullite
Common commodities
Fused mullite high-performance refractory bricksSintered mullite ceramic fiber insulationMullite glass melting furnace blockThermocouple protection tube made from mulliteMullite refractory tiles for steelmakingMullite crucible for chemical processingMullite fireclay for kiln manufacturingHeat-resistant mullite ceramic tubesMullite ceramic monolithic shapesMullite ceramic frit for glazes