Imported USA Indonesian Coal Suppliers shubham corporation. PRODUCTS. USA Steam Coal 6200 NAR (7200 CV) VIEW PRODUCT. USA Steam Coal 6000 NAR (6800 / 7000 CV) VIEW PRODUCT. USA Steam Coal 6400 NAR (7400 CV) VIEW PRODUCT. USA Steam Coal 6700 NAR (7500 CV) VIEW PRODUCT. USA Steam Coal 6300 NAR (7300 CV)