Refractory ---------- (a compound of alumina and of silica) taphole clay mud-nk-c15 14 pallets (4088 pieces) invoice no. kyvf-19-09 hs code: 3816.00 refractory ---------- (a compound of alumina and of silica) taphole clay mud-nk-c15 14 pallets (4088 pieces) refractory ---------- (a compound of alumina and of silica) taphole clay mud-nk-c15 14 pallets (4088 pieces)