HS Nomenclature used HS 1988/92 (H0)HS Code 690210: Refractory bricks, blocks, tiles and similar refractory ceramic constructional goods; containing by weight, singly or together, more than 50% of the elements Mg, Ca or Cr, expressed as MgO, CaO or Cr2o3Please note: Exports is gross exports and Imports is gross imports